CLD AP79 rev 0D Application Note Cree® XLamp® LED B10 Candelabra Reference Design Table of contents Introduction Introduction....................................................................................1 The B10 lamp designation defines a variety of primarily Design approach/objectives.........................................................2 decorative lamps. They are used in ornamental luminaires The 6-step methodology................................................................3 such as chandeliers, sconces and pendants, in which the lamp 1. Define lighting requirements................................................3 is typically visible and contributes to the aesthetics of the 2. Define design goals..............................................................6 luminaire. Because the lamp shape is intended to resemble 3. Estimate efficiencies of the optical, thermal & electrical a candle flame, B10 lamps are commonly called candelabra systems.................................................................................6 4. Calculate the number of LEDS needed...............................9 5. Consider all design possibilities and choose the best.....12 6. Complete the final steps....................................................13 Conclusions..................................................................................18 www.cree.com/Xlamp Special thanks..............................................................................18 lamps. To date, B10 lamps based on a single LED have been unable to match the light output of incandescents. Multi-LED configurations complicate the overall system and packaging design. Several vendors have developed multi-LED B10 lamps, attempting to focus on features that mimic the appearance of filament‑style bulbs. The focus on the aesthetics of these bulbs has been at the expense of efficacy and light output. Testing Reliance on any of the information provided in this Application Note is at the user’s sole risk. Cree and its affiliates make no warranties or representations about, nor assume any liability with respect to, the information in this document or any LED-based lamp or luminaire made in accordance with this reference design, including without limitation that the lamps or luminaires will not infringe the intellectual property rights of Cree or a third party. Luminaire manufacturers who base product designs in whole or part on any Cree Application Note or Reference Design are solely responsible for the compliance of their products with all applicable laws and industry requirements. Copyright © 2011-2016 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree®, XLamp® and EasyWhite® are registered trademarks and the Cree logo is a trademark of Cree, Inc. ENERGY STAR® is a registered trademark of the U.S. Environmental Protection Agency. Other trademarks, product, and company names are the property of their respective owners and do not imply specific product and/ or vendor endorsement, sponsorship or association. For product specifications, please see the data sheets available at www.cree.com. For warranty information, please contact Cree Sales at [email protected]. Cree, Inc. 4600 Silicon Drive Durham, NC 27703 USA Tel: +1.919.313.5300 1 XLamp ® B10 CANDELABRA Reference Design of LED-based B10 lamps conducted by the Department of Energy (DOE) Commercially Available LED Product Evaluation and Reporting (CALiPER) program showed inconsistent lamp performance and quality and instances of inflated performance claims.1 This application note details prototype B10 lamps based on three Cree XLamp® LED parts: 1) XLamp XM-L EasyWhite® (EZW) LED, a conventional LED with unique color consistency features 2) XLamp XM-L High Voltage White (HVW) LED, a high-voltage LED, capable of supporting high‑efficiency, high‑voltage device drivers 3) XLamp XT-E HVW LED, another, smaller‑form high‑voltage LED. The several designs we created allow for the evaluation of two distinct styles of lamp development: the first conventional in supporting standard voltage LEDs, the second creating high-voltage designs that support smaller and more efficient device drivers. Using the XM-L EZW LED enables a single LED component to deliver the performance and design simplicity needed for a 25 watt equivalent B10 replacement lamp that conforms to ENERGY STAR® requirements and matches or exceeds the light characteristics of existing incandescent lamps. Cree’s EasyWhite technology provides excellent LED-to-LED color consistency, reducing LED-to-LED color variation to within a 2-step Mac Adam ellipse. The XM-L HVW and XT-E HVW LEDs offer advantages in light output, efficacy and current. These high-‑oltage LEDs present an opportunity to use drivers that are smaller and more efficient than drivers for lower voltage parts. In addition, high‑voltage LEDs can perform at lower operating temperatures, thereby extending the lifetime of both the LED and the driver. We consider XLamp high‑voltage LEDs and correspondingly more efficient drivers to be enabling technology for high efficacy, small form‑factor LED replacement lamps. This design effort shows it is possible to create an XLamp LED-based B10 lamp delivers system efficacy comparable to the best largerformat LED replacement lamps. Design approach/objectives In the “LED Luminaire Design Guide”, Cree advocates a 6-step framework for creating LED luminaires. All Cree reference designs use this framework, and the design guide’s summary table is reproduced below. 1 DOE Solid-State Lighting CALiPER Program, Summary of Results: Round 8 of Product Testing DOE Solid-State Lighting CALiPER Program, Summary of Results: Round 9 of Product Testing DOE Solid-State Lighting CALiPER Program, Summary of Results: Round 11 of Product Testing Copyright © 2011-2016 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree®, XLamp® and EasyWhite® are registered trademarks and the Cree logo is a trademark of Cree, Inc. ENERGY STAR® is a registered trademark of the U.S. Environmental Protection Agency. Other trademarks, product, and company names are the property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship or association. For product specifications, please see the data sheets available at www.cree.com. For warranty information, please contact Cree Sales at [email protected]. 2 XLamp ® B10 CANDELABRA Reference Design Table 1: Cree 6-step framework Step Explanation 1. Define lighting requirements • The design goals can be based either on an existing fixture or on the application’s lighting requirements. 2. Define design goals • • Specify design goals, which will be based on the application’s lighting requirements. Specify any other goals that will influence the design, such as special optical or environmental requirements. 3. Estimate efficiencies of the optical, thermal & electrical systems • • • Design goals will place constraints on the optical, thermal and electrical systems. Good estimations of efficiencies of each system can be made based on these constraints. The combination of lighting goals and system effiiciencies will drive the number of LEDs needed in the luminaire. 4. Calculate the number of LEDs needed • Based on the design goals and estimated losses, the designer can calculate the number of LEDs to meet the design goals. 5. Consider all design possibilities and choose the best • • With any design, there are many ways to achieve the goals. LED lighting is a new field; assumptions that work for conventional lighting sources may not apply. 6. Complete final steps • • • • • Complete circuit board layout. Test design choices by building a prototype luminaire. Make sure the design achieves all the design goals. Use the prototype to further refine the luminaire design. Record observations and ideas for improvement. The 6-step methodology The goal of this design is to create XLamp LED-based B10 replacement lamps that deliver performance equivalent to 25- and 40-watt incandescent B10 lamps and conform to ENERGY STAR requirements. 1. Define lighting requirements Because B10 lamps are decorative, aesthetics is perhaps the most important design criterion. In addition, the light source and the associated components must fit in the space-constrained B10 form factor. Although aesthetics is a subjective assessment, there are specific metrics, listed in Table 2 below, that can quantify lamp performance. Table 2: Design criteria Importance Critical Important Characteristics Metric Aesthetics N/A Form factor N/A Luminous flux lumens (lm) Luminance/illuminance foot candles (fc)/lux Electrical power watts (W) Price $ Lifetime hours Correlated color temperature (CCT) Kelvin Color rendering index (CRI) 100-point scale Manufacturability $ Comply with ENERGY STAR Has label As shown in Figure 1, B10 lamps have a torpedo shape and are blunt or flame tipped. They typically have a candelabra (E12) or medium (E26) base. Copyright © 2011-2016 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree®, XLamp® and EasyWhite® are registered trademarks and the Cree logo is a trademark of Cree, Inc. ENERGY STAR® is a registered trademark of the U.S. Environmental Protection Agency. Other trademarks, product, and company names are the property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship or association. For product specifications, please see the data sheets available at www.cree.com. For warranty information, please contact Cree Sales at [email protected]. 3 Figure 1 XLamp ® B10 CANDELABRA Reference Design Figure 1: Blunt (left) and flame-tipped (right) B10 lamp shapes There are many incandescent B10 lamps on the market today. They typically operate at low wattages and produce warm light. Like all incandescent lamps, they are energy inefficient and have a relatively short lifetime. A number of CFL B10 lamps are also available. They offer energy savings and longer life than incandescents, but are not able to achieve the higher levels of efficacy found in linear fluorescent bulbs. Cree measured the photometric and electrical performance of one incandescent and three comparison CFL B10 lamps.2 Table 3 presents a summary of the data. Table 3: Comparison B10 lamp test results Characteristic Luminous flux Efficacy Unit Incandescent CFL 1 CFL 2 CFL 3 lm 198.8 172 145 154 lm/W 8.0 33.1 27.0 29.1 Input power W 25 5.20 5.25 5.28 CCT K 2538 2701 2683 2718 99.7 82 83 82 0.56 0.55 0.56 CRI Power factor The CFL lamps are more efficient than the incandescent but do not match the incandescent lamp’s CRI. All the lamps produce warm white light. The goal of this design is to mimic the color performance and light output of an incandescent lamp while providing energy, and therefore cost, savings. Cree measured an incandescent B10 lamp and a CFL B10 lamp to obtain polar candela distribution graphs, shown in Figure 2, to serve as baselines for the XLamp LED B10 lamps.3 2 3 Photometric performance was measured in a 2-meter integrating sphere. Electrical performance was measured using an AC power analyzer. Measurements were taken at the Cree facility in Durham, NC. Measurements were taken using a type A goniophotometer at the Cree facility in Durham, NC. Copyright © 2011-2016 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree®, XLamp® and EasyWhite® are registered trademarks and the Cree logo is a trademark of Cree, Inc. ENERGY STAR® is a registered trademark of the U.S. Environmental Protection Agency. Other trademarks, product, and company names are the property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship or association. For product specifications, please see the data sheets available at www.cree.com. For warranty information, please contact Cree Sales at [email protected]. 4 XLamp ® B10 CANDELABRA Reference Design 2 /lamp: 204.0077 °, Vertical: 5° Filename: IKEA CFL B10 Manufacturer: Cree Luminaire: IKEA CFL B10 Lamp Output: 1 lamp(s), rated Lumens/lamp: 157.1551 Max Candela: 24.3 at Horizontal: 22.5°, Vertical: 90° Input Wattage: 5.2 Luminous Opening: Point Test: 1,841 Test Lab: Cree Photometry : Type C CIE Class: Semi-Direct T Roadway Summary Figure 2: Polar candela distribution for B10 incandescent (left) and CFL (right) B10 lamps Flood Summary Flood Summary Cutoff Classification: NONCUTOFF Horizontal Vertical Horizontal Vertical Efficiency Lumens Efficiency Lumens The following tables summarize an LED-based for the ENERGY Distribution: requirements Unclassified, Spread Unclassified Spread B10 replacement lamp must meet to be eligible Spreadto qualify Spread .5 Field Max(10%): Cd, 90 Deg 99.6% Vert: 203.2 STAR program. .8 Beam Max Cd, (50%): 80 to <90 93.6% Deg: 190.9 FF 24.3 315 Field (10%): 99.2% 155.9 n/a 345.1 4 19.1201.3 Beam (50%): 78.7% 123.6 n/a 97.2 Total: 100% 32.8% Table 4: General ENERGY STAR requirements 157.2 4 The ENERGY STAR requirements all lamps: Lumens % Lamp Total: 100% for 204.0 % % n/a Downward Street Side: 51.5 Downward 48.2 30.6% Lumens PerHouse ZoneSide: Requirements Downward 99.6 Lumens 63.4% Zone Lumens % Total: Total Zone % Total Lumens Per Zone % Characteristic % Upward Street Side:chromaticity 31.0 19.7% Duv tolerances listed below. 0-5 0.4 0.2% 90-95 quadrangles 10.0 and 4.9% 0-5 0.2 0.2% Upward House Side: 26.5 16.9% 5-10 1.1 0.5% 95-100 9.9 4.8% 5-10 0.7 0.5% Nominal CCT Target CCT (K) and Tolerance Upward Total: 57.5 36.6% CCT and Duv 10-15 2.0 1.0% 100-105 9.8 4.8% 10-15 1.3 0.8% 2700 K 2725 ± 145 Total 157.1 100% 15-20 2.9 Lumens: 1.4% 105-110 9.6 15-20 3045 1.8 3000 K4.7% ± 175 1.2% 3500 K 3465 ± 245 20-25 3.7 1.8% 110-115 9.2 4.5% 20-25 3985 2.4 4000 K ± 275 1.6% % % % Zone Lumens % Total Zone Lumens % Total Lamp must have one of the following designated CCTs (per ANSI/NEMA/ANSLG C78.377-2008) consistent with the 7-step 90-95 8.6 5.5% 95-100 8.0 5.1% 7.3 4.7% 100-105 Target Duv and Tolerance 105-110 110-115 Dimming Warranty 0.006 4.2% 0.006 0.006 3.7% 0.006 25-30 Lumen 4.2 Summary 2.1%The115-120 8.4 4.1% 3.2 hours) 2.0% 115-120 5.0 3.2% change in chromaticity over the minimum lumen25-30 test period (6000 shall be within 0.007 on the CIE (u’, v’) diagram. 30-35 4.8 %2.3% 120-125 7.7 3.8% 30-35 3.9 2.5% 120-125 4.2 2.7% Zone Lumens Luminaire Minimum CRI (RA) of 80. In addition, the R9 value must be greater than 0. Zonal Color maintenance CRI 0.000 ± 6.6 ± 0.000 0.000 ± 5.8 ± 0.001 35-40 0-30 40-45 0-40 5.4 9.7 6.0 18.4 2.6%Lamps 125-130 6.9 3.4% 4.8clearly 3.0% 3.5is dimmable 2.2% or not 6.2% may be dimmable or non-dimmable. Product35-40 packaging must indicate125-130 whether the lamp dimmable. 2.9% 130-135 5.8 2.9% 40-45 5.6 3.6% 130-135 2.7 1.7% 11.7% 45-50 0-60 50-55 60-90 6.6 45.6 7.3 54.0 warranty must be5.0 provided for lamps, covering material replacement minimum of three from the date of 3.2%A29% 135-140 2.5% 45-50repair or6.4 4.1%for a135-140 2.0(3) years 1.3% Allowable lamp bases 55-60 70-100 60-65 Power factor 90-120 8.1 53.0 8.8 41.4 purchase. 3.6% 140-145 4.2 2.1% 34.4% Must be a lamp base listed by ANSI. 4.0% 145-150 3.4 1.7% 33.7% 50-55 7.2 4.6% 140-145 1.4 0.9% 55-60 8.0 5.1% 145-150 0.9 0.6% For lamp power < 5 W and for low-voltage lamps, no minimum power factor is required. 4.3% 1.2% 8.6 5.5% 150-155 0.6 0.4% For150-155 lamp power > 5 2.5 W, power factor must be > 0.70. 60-65 26.3% Note: Power factor must be measured at rated voltage. 65-70 9.4 4.6% 155-160 1.3 0.6% 65-70 9.1 5.8% 155-160 0.4 0.2% 0-90 99.6 63.4% Minimum operating temperature Integral lamp shall have a minimum operating temperature of 20 °C or below. 70-75 9.5 4.6% 160-165 0.5 0.2% 70-75 9.3 5.9% 160-165 0.2 0.1% 90-180 57.5 36.6% ≥ 120 Hz 75-80 9.5 4.7%100% 165-170 0.2 0.1% 75-80 9.1 5.8% 165-170 0.1 0.1% 0-180 157.2 LED operating frequency Note: This performance characteristic addresses problems with visible flicker due to low-frequency operation and applies to steadyas well as dimmed 80-85 9.8 4.8%state 170-175 0.1 operation. 0.1% 80-85 9.1 5.8% 170-175 0.1 0% Operating voltage 85-90 4 10.1 shall operate 0.0 at rated nominal 240 or 277 VAC or 24 VAC or VDC. 4.9%Lamp 175-180 0% voltage of 120, 85-90 9.0or at 12 5.7% 175-180 0.0 0% ENERGY STAR Program Requirements for Integral LED Lamps Eligibility Criteria - Version 1.4, Table 4 Copyright © 2011-2016 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree®, XLamp® and EasyWhite® are registered trademarks and the Cree logo is a trademark of Cree, Inc. ENERGY STAR® is a registered trademark of the U.S. Environmental Protection Agency. Other trademarks, product, and company names are the property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship or association. For product specifications, please see the data sheets available at www.cree.com. For warranty information, please contact Cree Sales at [email protected]. 5 XLamp ® B10 CANDELABRA Reference Design The ENERGY STAR requirements for B10 lamps:5 Table 5: ENERGY STAR requirements for B10 lamps Characteristic Requirement Minimum luminous efficacy 40 lm/W Lamp shall have minimum light output (total luminous flux) at least corresponding to the target wattage of the lamp to be replaced, as shown below. Minimum light output Nominal wattage of lamp to be replaced (watts): Minimum initial light output of LED lamp (lumens): 25 40 60 150 300 500 Maximum lamp diameter Not to exceed target lamp diameter. Lumen maintenance > 70% lumen maintenance (L70) at 15,000 hours of operation. Rapid-cycle stress test Cycle times must be 2 minutes on, 2 minutes off. Lamp will be cycled once for every 2 hours of L70 life. 2. Define design goals The design goals for this project: Table 6: Design goals Characteristic Unit Minimum Goal Target Goal Light output Lm 150 for 25‑W lamp 300 for 40‑W lamp 220 for 25‑W lamp 330 for 40‑W lamp Illuminance profile Lux Better than incandescent Better than incandescent W < 25 4 Hours 25,000 50,000 K 2600 2700 80 85 30 40 Power Lifetime CCT CRI Maximum ambient temperature °C 3. Estimate efficiencies of the optical, thermal & electrical systems Thermal Requirements An XLamp LED operating at 4-5 watts of power, at steady state temperature, needs a heat sink to dissipate the thermal load. In this design, the heat sink must not only dissipate the heat generated by the LED, but also provide a mechanical frame for the LED, optic, driver and base and fit into the B10 standard enclosure. The small size of the B10 form factor limits the choices for a heat sink and makes it a challenge to fit the heat sink into the available space. After testing several designs, Cree chose an off-the-shelf heat sink from Cooliance for this B10 design.6 The heat sink is black anodized aluminum with cooling pins. 5 6 Ibid., Table 7B Model CML32301-30-3-101 Copyright © 2011-2016 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree®, XLamp® and EasyWhite® are registered trademarks and the Cree logo is a trademark of Cree, Inc. ENERGY STAR® is a registered trademark of the U.S. Environmental Protection Agency. Other trademarks, product, and company names are the property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship or association. For product specifications, please see the data sheets available at www.cree.com. For warranty information, please contact Cree Sales at [email protected]. 6 XLamp ® B10 CANDELABRA Reference Design Figure 4 Figure 3: Anodized aluminum heat sink As shown in Figure 4, to make space for the driver, we removed pins from the heat sink, leaving the two outer rings of pins and creating a cavity in which to mount the driver. A STEP file for the heat sink is available. Figure 5 Figure 4: Heat sink with pins removed Figure 6 Cree performed thermal simulations to verify the effectiveness of this design.7 Figure 5 shows the temperature distribution between the junction and the heat sink. The peak temperature on the scale occurs at the junction of the LED. Figure 6 shows the temperature distribution between the printed circuit board (PCB) and the heat sink. Figure 5: Junction-to-heat-sink temperature distribution 7 Figure 6: Board-to-heat-sink temperature distribution Cree used Cfdesign Spring,-2011 release. Copyright © 2011-2016 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree®, XLamp® and EasyWhite® are registered trademarks and the Cree logo is a trademark of Cree, Inc. ENERGY STAR® is a registered trademark of the U.S. Environmental Protection Agency. Other trademarks, product, and company names are the property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship or association. For product specifications, please see the data sheets available at www.cree.com. For warranty information, please contact Cree Sales at [email protected]. 7 Figure 7 XLamp ® B10 CANDELABRA Reference Design Figure 7 is a thermal simulation showing a cross section of the lamp at steady state in a 25 °C ambient operating environment. The solder point temperature (TSP) in the simulation is 79 °C. Figure 7: Thermal simulation Table 7 shows the thermal resistance and calculated junction temperature (TJ) for the XLamp LED B10 lamps. Table 7: Thermal simulation data Lamp TSP Power Thermal Resistance TJ XM-L EZW B10 79 °C 4W 2.5 °C/W 89 °C XM-L HVW B10 79 °C 4W 3.5 °C/W 93 °C XT-E HVW B10 79 °C 4W 6.5 °C/W 92 °C Drive Electronics Fitting a driver into the constrained space within the B10 form factor is also a design challenge. Moreover, in this design, the driver must fit into the cavity created in the heat sink. For the XM-L EZW lamp, Cree chose a CE/UL certified constant current driver from Wayjun Technology that provides efficiency of 80% and a power factor of 0.53. For the XM-L HVW lamp, Power Integrations developed a non-isolated buck boost LED driver that provides efficiency of 86% and a power factor of 0.97. For the XT-E HVW lamp, Cree chose a constant current driver from iWatt that provides efficiency of 86% and a power factor of 0.55. Copyright © 2011-2016 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree®, XLamp® and EasyWhite® are registered trademarks and the Cree logo is a trademark of Cree, Inc. ENERGY STAR® is a registered trademark of the U.S. Environmental Protection Agency. Other trademarks, product, and company names are the property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship or association. For product specifications, please see the data sheets available at www.cree.com. For warranty information, please contact Cree Sales at [email protected]. 8 XLamp ® B10 CANDELABRA Reference Design Figure 8: Views of B10 lamp drivers Secondary and Tertiary Optics The design uses a white Khatod diffuser lens to diffuse the light from the LED and produce the omnidirectional light output desired of a B10 lamp.8 The white lens obscures the single light source and produces a uniform light pattern. An existing standard glass lamp case was used to enclose the lamp components. Figure 9: Khatod diffuser lens and lamp glass enclosure 4. Calculate the number of LEDS needed Figures 10 and 11 show basic LED electrical data and optical output from Cree’s Product Characterization Tool (PCT). The lumen target is 200 lumens and the optical and electrical efficiencies are both 80%. 8 Khatod Optoelectronics PLJT20 series Copyright © 2011-2016 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree®, XLamp® and EasyWhite® are registered trademarks and the Cree logo is a trademark of Cree, Inc. ENERGY STAR® is a registered trademark of the U.S. Environmental Protection Agency. Other trademarks, product, and company names are the property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship or association. For product specifications, please see the data sheets available at www.cree.com. For warranty information, please contact Cree Sales at [email protected]. 9 XLamp ® B10 CANDELABRA Reference Design LED System Comparison Report 1 System: 200 Target Lumens : Current (A) LED 1 Model Flux T6 [280] Electrical Efficiency LED 2 Model Cree XLamp XM-L 6V {EZW} $ Price SYS # LED LED lm/W 80% Optical Efficiency: Tsp (ºC) LED Vf 79 SYS lm tot Flux Model Cree XLamp XM-L 12V {EZW} T6 [280] $ Price SYS # LED LED lm/W Tsp (ºC) 79 Flux Price LED Vf (none) $ SYS lm tot Current (A) 0.100 6 90.6 5.26 230.4 3 84.8 10.71 217.7 #N/A #N/A 0.150 4 87 5.31 222.7 2 80.2 10.9 210.5 #N/A #N/A 0.200 3 84.8 5.36 217.7 2 76.8 11.08 272.9 #N/A #N/A 0.250 3 82.5 5.41 267.2 2 73.9 11.25 332.3 #N/A #N/A 0.300 2 80.2 5.45 210.5 2 71 11.4 388.7 #N/A #N/A 0.350 2 78.8 5.5 242 1 68.4 11.55 221.1 #N/A #N/A 0.400 2 76.8 5.54 272.9 1 65.9 11.68 246.4 #N/A #N/A 0.450 2 75.4 5.58 302.9 1 63.6 11.81 270.2 #N/A #N/A 0.500 2 73.9 5.62 332.3 1 61.4 11.92 292.7 #N/A #N/A 0.550 2 72.3 5.66 360.9 1 59.3 12.03 313.7 #N/A #N/A 0.600 2 71 5.7 388.7 1 57.3 12.12 333.3 #N/A #N/A 0.650 1 69.7 5.74 207.9 1 55.4 12.2 351.5 #N/A #N/A 0.700 1 68.4 5.77 221.1 1 53.6 12.27 368.4 #N/A #N/A 0.750 1 67.1 5.81 234 1 51.9 12.33 384 #N/A #N/A 0.800 1 65.9 5.84 246.4 1 50.2 12.39 398.3 #N/A #N/A 0.850 1 64.7 5.87 258.5 1 48.7 12.43 411.2 #N/A #N/A 0.900 1 63.6 5.9 270.2 1 47.2 12.46 422.9 #N/A #N/A 0.950 1 62.4 5.93 281.6 1 45.7 12.48 433.4 #N/A #N/A 1.000 1 61.4 5.96 292.7 1 44.3 12.49 442.6 #N/A #N/A 1.100 1 59.3 6.01 313.7 #N/A System #N/A Comparison #N/A #N/A #N/A #N/A LED Report 1.200 1 57.3 6.06 333.3 #N/A #N/A #N/A #N/A #N/A #N/A Figure 10: Cree PCT data For XM-L EZW LED 1 1 1.300 55.4 6.1 351.5 #N/A #N/A #N/A #N/A #N/A #N/A System: Target Lumens53.6 : 200 Optical 80% Electrical 1.400 1 6.14 368.4 #N/A Efficiency: #N/A #N/A #N/A #N/A Efficiency: #N/A 1.500 1 51.9 6.17 384 #N/A #N/A #N/A #N/A #N/A #N/A LED 1 LED 2 1.600 1 Model Cree 50.2XLamp XM-L6.19 398.3 #N/A #N/A #N/A #N/A #N/A #N/A {HVW} Cree XLamp XT-E {HVW} (none) Model Model 1.700 1 48.7 6.21 411.2 #N/A #N/A #N/A #N/A #N/A #N/A S6 [182] 79 P3 [73.9] 79 Flux Tsp (ºC) Flux Tsp (ºC) Flux 1.800 1 47.2 6.23 422.9 #N/A #N/A #N/A #N/A #N/A #N/A $45.7 $#N/A $#N/A Price Price 1.900 1 Price 6.24 433.4 #N/A #N/A #N/A #N/A SYS LED Vf SYS lm tot SYS LED Vf SYS 2.000 1 # LED LED 44.3 lm/W 6.24 442.6 #N/A# LED LED #N/Alm/W #N/A #N/Alm tot #N/A #N/A 0.020 3 102.9 44.2 217.3 4 74.7 45.67 217.4 #N/A #N/A This document2 is provided for 96.2 informational purposes is not a warranty or a 3 specification. For68.1 product specifications, the data sheets available 0.030 44.97 only and207.8 47.15 please see 230.4 #N/Aat www.cree.com. #N/A Copyright © 2009-2011 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree, the Cree logo and XLamp are registered trademarks 0.040 2 91.3 45.69 267.4 3 62.4 48.44 290.5 #N/A #N/A 0.050 2 87.2 46.35 323.8 2 57.7 49.56 229 #N/A #N/A 0.060 2 83.5 46.96 376.9 2 53.6 50.5 259.6 #N/A #N/A 0.070 1 80.1 47.5 213.4 #N/A #N/A #N/A #N/A #N/A #N/A 0.080 1 77 48 236.7 #N/A #N/A #N/A #N/A #N/A #N/A 0.090 1 74.1 48.44 258.4 #N/A #N/A #N/A #N/A #N/A #N/A 0.100 1 71.4 48.82 278.6 #N/A #N/A #N/A #N/A #N/A #N/A 0.110 1 68.7 49.15 297.2 #N/A #N/A #N/A #N/A #N/A #N/A 0.120 1 66.3 49.42 314.3 #N/A #N/A #N/A #N/A #N/A #N/A 0.130 #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A Cree PCT data and XT-E HVW 0.140 #N/A #N/AFigure 11: #N/A #N/AFor XM-L HVW #N/A #N/ALEDs #N/A #N/A #N/A #N/A 0.150 #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A Figure 12 shows basic LED electrical#N/A data and optical from Cree’s PCT#N/A for one XT-E HVW LED.#N/A The lumen#N/A target is 150 lumens 0.160 #N/A #N/A output#N/A #N/A #N/A and #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A the optical and0.170 electrical#N/A efficiencies#N/A are both 80%. 0.180 #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A 0.190 #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A 0.200 #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A 0.210 #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A 0.220 #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A Copyright © 2011-2016 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree®, XLamp® and EasyWhite® are registered trademarks and the Cree logo is a ® 0.230 #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A trademark of Cree, Inc. ENERGY STAR is a registered trademark of the U.S. Environmental Protection Agency. Other trademarks, product, and company names are the property of their respective owners and do not imply specific 0.240 product and/or #N/A vendor endorsement, sponsorship #N/A or association. For product specifications,#N/A please see the data sheets available at www.cree.com. #N/A #N/A #N/A #N/A #N/AFor warranty information, #N/Aplease #N/A contact Cree Sales at [email protected]. 10 0.250 #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A 0.260 #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A XLamp ® B10 CANDELABRA Reference Design LED System Comparison Report 1 System: 150 Target Lumens : 80% Optical Efficiency: Current (A) LED 1 Model Flux LED 2 Model Cree XLamp XT-E {HVW} prelim Q2 [87.4] Tj (ºC) (none) Flux 79 $ Price SYS # LED LED lm/W Price Tj (ºC) $ 25 - LED Vf SYS lm tot 0.020 3 90.6 45.21 195.8 #N/A #N/A #N/A #N/A 0.030 2 82.8 46.68 185.5 #N/A #N/A #N/A #N/A 0.040 2 76.4 47.92 234.7 #N/A #N/A #N/A #N/A 0.050 2 70.9 48.93 278.1 #N/A #N/A #N/A #N/A 0.060 1 66.2 49.72 157.9 #N/A #N/A #N/A #N/A 0.070 #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A Figure 12: Cree PCT for XT-E HVW LED 0.080 #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A 0.090 #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A The XM-L EZW and XM-L HVW lamps use one LED. We made XT-E HVW lamps using one and two LEDs. 0.100 #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A 0.110 #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A In addition to industry-leading efficacy, the XM-L EZW LED also provides the color consistency of an incandescent lamp without 0.120 #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A complicated color mixing. We chose to work 12-V standard highlighted #N/A in yellow in #N/A 0.130 with the #N/A #N/A CRI, order #N/Acode XMLEZW-00-0000-0D0T627F, #N/A #N/A #N/A 0.140CCT to#N/A #N/A lamp.#N/A #N/A #N/A #N/A than the #N/A Figure 13 below, to give the closest possible an incandescent The 12-V LED can operate at a lower current 6-V LED, #N/A 0.150 #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A enabling the use of a smaller, more‑efficient driver. 0.160 #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A 0.170 #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A 0.180 #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A Base Order Codes 0.190 #N/A #N/AOrder Code #N/A #N/A #N/A4-Step Order #N/A #N/A #N/A Min. Luminous Flux @ 700 2-Step Code CCT mA, 85° C 0.200 Color #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A Range Chromaticity #N/A #N/A #N/A #N/A Chromaticity #N/A #N/A #N/A #N/A Group Flux 0.210 (lm) Region Region 0.220 #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A U4 340 XMLEZW-00-0000-0B00U440H 0.230 #N/A #N/A #N/A #N/A #N/A XMLEZW-00-0000-0B00U440F #N/A #N/A #N/A 0.240 #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A 4000 K U3 320 40H XMLEZW-00-0000-0B00U340H 40F XMLEZW-00-0000-0B00U340F 0.250 #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A U2 300 XMLEZW-00-0000-0B00U240H XMLEZW-00-0000-0B00U240F 0.260 #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A U3 320 XMLEZW-00-0000-0B00U335H 0.270 #N/A #N/A #N/A #N/A #N/A XMLEZW-00-0000-0B00U335F #N/A #N/A #N/A 0.280 #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A 3500 K U2 300 35H XMLEZW-00-0000-0B00U235H 35F XMLEZW-00-0000-0B00U235F 0.300 #N/A #N/A #N/A #N/A #N/A #N/A #N/A #N/A T6 280 XMLEZW-00-0000-0B00T635H 0.350 #N/A #N/A #N/A #N/A #N/A XMLEZW-00-0000-0B00T635F #N/A #N/A #N/A U3 Standard CRI EasyWhite 3000 K 2700 K 320 XMLEZW-00-0000-0B00U330H XMLEZW-00-0000-0B00U330F U2 This document is provided for informational purposes only and is not a warranty or a specification. For product specifications, please see the data sh 300 Copyright © 2009-2011 Cree, Inc.XMLEZW-00-0000-0B00U230H All rights reserved. The information in this document is subjectXMLEZW-00-0000-0B00U230F to change without notice. Cree, the Cree logo and T6 280 T5 260 XMLEZW-00-0000-0B00T530H XMLEZW-00-0000-0B00T530F U2 300 XMLEZW-00-0000-0B00U227H XMLEZW-00-0000-0B00U227F T6 280 T5 260 T4 240 30H 27H XMLEZW-00-0000-0B00T630H XMLEZW-00-0000-0B00T627H XMLEZW-00-0000-0B00T527H XMLEZW-00-0000-0B00T427H 30F 27F XMLEZW-00-0000-0B00T630F XMLEZW-00-0000-0B00T627F XMLEZW-00-0000-0B00T527F XMLEZW-00-0000-0B00T427F Figure 13: XM-L EZW LED binning data For the XM-L HVW lamp, we chose to work with order code XML-HVW-Q0-0000-0000LSSE7, highlighted in yellow in Figure 14, to closely match an incandescent lamp’s CCT. Copyright © 2011-2016 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree®, XLamp® and EasyWhite® are registered trademarks and the Cree logo is a trademark of Cree, Inc. ENERGY STAR® is a registered trademark of the U.S. Environmental Protection Agency. Other trademarks, product, and company names are the property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship or association. For product specifications, please see the data sheets available at www.cree.com. For warranty information, please contact Cree Sales at [email protected]. 11 XLamp ® B10 CANDELABRA Reference Design CCT Range Color Min. Max. Cool White 5,000 K 8,300 K Neutral White 3,700 K 5,000 K Warm White 2,600 K 3,700 K Base Order Codes Min Luminous Flux @ 44 mA (lm) Order Code Group Flux (lm) T3 220 XMLHVW-Q0-0000-0000LT351 T4 240 XMLHVW-Q0-0000-0000LT451 S6 182 XMLHVW-Q0-0000-0000LS6E5 T2 200 XMLHVW-Q0-0000-0000LT2E5 S5 172 XMLHVW-Q0-0000-0000LS5E7 S6 182 XMLHVW-Q0-0000-0000LS6E7 Figure 14: XM-L HVW LED binning data Similarly, for the XT-E HVW lamp, we chose order code XTEHVW-Q0-0000-00000L9E7, highlighted in yellow in Figure 15, to closely match an incandescent lamp’s CCT. Base Order Codes Min Luminous Flux @ 22 mA (lm) CCT Range Color Min. Max. Cool White 5,000 K 8,300 K Neutral White 3,700 K 5,000 K Warm White 2,600 K 3,700 K Order Code Group Flux (lm) Q5 107 XTEHVW-Q0-0000-00000LD51 R2 114 XTEHVW-Q0-0000-00000LE51 Q2 87.4 XTEHVW-Q0-0000-00000LAE5 Q3 93.9 XTEHVW-Q0-0000-00000LBE5 P4 80.6 XTEHVW-Q0-0000-00000L9E7 Q2 87.4 XTEHVW-Q0-0000-00000LAE7 Figure 15: XT-E HVW binning data The purpose of this design is to demonstrate that single high‑power LEDs such as the XLamp XM-L LED can deliver equivalent lighting and substantially greater efficacy than 25‑W incandescent B10 lamps currently available. 5. Consider all design possibilities and choose the best Optical Efficiency Producing omnidirectional light output from a B10 lamp using a directional XLamp LED presents a design challenge. To meet that challenge and minimize light loss within the lamp we mounted the LED and the secondary optic 1 inch (2.5 cm) above the base of the heat sink on an aluminum spacer. As shown in Figures 16 and 17, this design allows light that would otherwise be reflected upward to exit the lamp downward and increases the amount of light in the >90° beam angle. This results in a lamp that can closely approximate the light pattern of an incandescent B10 lamp. Copyright © 2011-2016 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree®, XLamp® and EasyWhite® are registered trademarks and the Cree logo is a trademark of Cree, Inc. ENERGY STAR® is a registered trademark of the U.S. Environmental Protection Agency. Other trademarks, product, and company names are the property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship or association. For product specifications, please see the data sheets available at www.cree.com. For warranty information, please contact Cree Sales at [email protected]. 12 XLamp ® B10 CANDELABRA Reference Design Figure 16: LED and optic mounted on heat sink Figure 17: LED and optic |mounted on spacer above heat sink The solid-aluminum spacer not only improves optical efficiency but also provides a thermal path to the heat sink, which in turn dissipates heat. 6. Complete the final steps This section describes the steps Cree followed to create a prototype B10 lamp using the Cree XLamp XM-L EZW, XM-L HVW and XT-E HVW LEDs and reviews the photometric, electrical and thermal results. Prototyping Details The essence of this prototyping design is to assemble the XLamp LED onto a metal-core printed circuit board (MCPCB), mount this PCB onto a spacer attached to a heat sink and assemble these components with the necessary secondary optics and driver to create an LEDbased lamp. The prototyping steps are detailed below. 1. We verified the component dimensions to insure a correct fit. 2. We soldered the driver input wires to the E12 base power connection. 3. We wrapped the driver in Kapton silicon adhesive tape to isolate the driver from the heat sink and provide thermal protection. Copyright © 2011-2016 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree®, XLamp® and EasyWhite® are registered trademarks and the Cree logo is a trademark of Cree, Inc. ENERGY STAR® is a registered trademark of the U.S. Environmental Protection Agency. Other trademarks, product, and company names are the property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship or association. For product specifications, please see the data sheets available at www.cree.com. For warranty information, please contact Cree Sales at [email protected]. 13 XLamp ® B10 CANDELABRA Reference Design 4. Following the recommendations for the XLamp XM family LEDs, we reflow soldered the LEDs onto the MCPCB with an appropriate solder paste and reflow profile. 5. We cleaned the flux residue with isopropyl alcohol. 6. We attached the 1-inch aluminum spacer to the heat sink using Arctic Silver thermal epoxy. 7. We drilled two thru-holes in the base of the heat sink on its diameter to permit the driver output wires to be connected to the MCPCB. 8. We inserted the driver into the heat sink, fed the DC output wires through the thru-holes and soldered them to the corresponding terminal pads on the MCPCB. 9. We fastened the optic to the MCPCB by heating the pegs of the optic and wrapping them under the MCPCB. 10. We applied a thin layer of thermal conductive compound to the back of MCPCB and secured it to the aluminum spacer. Copyright © 2011-2016 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree®, XLamp® and EasyWhite® are registered trademarks and the Cree logo is a trademark of Cree, Inc. ENERGY STAR® is a registered trademark of the U.S. Environmental Protection Agency. Other trademarks, product, and company names are the property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship or association. For product specifications, please see the data sheets available at www.cree.com. For warranty information, please contact Cree Sales at [email protected]. 14 XLamp ® B10 CANDELABRA Reference Design 11. We fastened the lamp case to the heat sink with Kwik Plastic epoxy. 12. We attached the base to the heat sink with Kwik Plastic epoxy. 13. We performed final testing. Results Measured Tsp Table 8 shows the measured solder point temperatures and calculated junction temperatures for the XLamp LED B10 lamps. These results closely match the temperature simulation and show that the heat sink is sufficient to dissipate the heat generated. Table 8: System temperature data Lamp TSP Current Voltage TJ XM-L EZW B10 79 °C 340 mA 11.6 V 87 °C XM-L HVW B10 87 °C 92.3 mA 48.8 V 110 °C XT-E HVW B10 92 °C 43.8 mA 95.7 V 117 °C Photometric Results Table 9 shows the photometric and electrical results for the XLamp LED B10 lamps at steady state (after 30 minutes, powered). The lamps demonstrate luminous flux and CCT comparable to an incandescent lamp with much higher efficacy at 80% less power. The XM-L HVW lamp nearly achieves the ENERGY STAR light output requirement for a 40‑W B10 lamp. Copyright © 2011-2016 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree®, XLamp® and EasyWhite® are registered trademarks and the Cree logo is a trademark of Cree, Inc. ENERGY STAR® is a registered trademark of the U.S. Environmental Protection Agency. Other trademarks, product, and company names are the property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship or association. For product specifications, please see the data sheets available at www.cree.com. For warranty information, please contact Cree Sales at [email protected]. 15 XLamp ® B10 CANDELABRA Reference Design Table 9: XM-L EZW B10 lamp photometric results Characteristic Unit XM-L EZW XM-L HVW XT-E HVW (1 LED) XT-E HVW (2 LEDs) Luminous flux lm 204 292 150 235 lm/W 50 57 49 48 Input power Efficacy W 4.1 5.2 3.3 4.9 CCT K 2696 3107 3021 3101 CRI 80.2 81.9 81.8 82.8 Power factor 0.52 0.97 0.56 0.55 The XM-L EZW prototype B10 lamp was measured to obtain a polar candela distribution, shown in Figure 18.9 This omnidirectional distribution is in close comparison to the distributions of example incandescent and CFL lamps. Because they were constructed in the same way as the XM-L EZW lamp, Cree expects the XM-L HVW and XT-E HVW lamps’ polar candela distributions to be similar to that of the XM-L EZW lamp. ename: B10 LED Prototype facturer: Cree minaire: B10 LED Prototype Output: 1 lamp(s), rated Lumens/lamp: 206.2059 Candela: 36.7 at Horizontal: 45°, Vertical: 62.5° Wattage: 4.1 Opening: Point Test: 1,842 est Lab: Cree ometry : Type C IE Class: Semi-Direct Figure 18: Polar candela distribution for XM-L EZW B10 lamp Summary Flood Summary assification: NONCUTOFF Distribution: TYPE IV, SHORT 90 Deg Vert: 16.5 Field (10%): 99.1% 204.4 n/a 244 19.6 Beam (50%): 68.5% 141.3 168 158.7 Total: 206.2 Horizontal Spread Vertical Spread Efficiency Lumens to that of incandescent and CFL examples. Table 10 shows the light distribution of the XM-L EZW B10 lamp compared to <90 Deg: Lumens % Lamp Street Side: 79.4 38.5% House Side: 74.9 36.3% nward Total: 154.3 74.8% Street Side: 28.0 13.6% House Side: 24.0 11.6% pward Total: 51.9 25.2% tal Lumens: 206.2 100% 100% Lumens Per Zone Zone Lumens % Total Zone Lumens % Total 0-5 0.8 0.4% 90-95 7.6 3.7% 5-10 2.3 1.1% 95-100 6.9 3.3% 10-15 3.8 1.8% 100-105 6.0 2.9% 15-20 5.2 2.5% 105-110 5.3 2.6% 2.3% 20-25 6.6 3.2% 110-115 4.7 en Summary 25-30 7.9 3.8% 115-120 4.2 2% ens % Luminaire 30-35 9.0 4.4% 120-125 3.7 1.8% 45-50 11.5 5.6% 135-140 2.2 1.1% 9 Measurements were taken using a type A goniophotometer at the Cree facility in Durham, NC. 5.7 Copyright © 2011-2016 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree®, XLamp® and EasyWhite® are registered trademarks and the Cree logo is a 10.1 4.9% 3.1 product, 1.5% and company names are the property of their respective owners and trademark of the U.S. Environmental Protection125-130 Agency. Other trademarks, 12.9% of Cree, Inc. ENERGY STAR® is a registered trademark35-40 do not imply specific product and/or vendor endorsement, sponsorship or association. For product specifications, please see the data sheets available at www.cree.com. For warranty information, please 40-45 10.9 5.3% 130-135 2.6 1.3% 22.1%Cree Sales at [email protected]. contact 16 1.7 44.5% 6.6 XLamp ® B10 CANDELABRA Reference Design Table 10: Zonal lumen summary Incandescent Zone CFL XM-L EZW Lumens % Lumens % Lumens % 0-30 14.3 7% 9.7 6.2% 26.6 12.9% 0-40 24.4 12% 18.4 11.7% 45.7 22.1% 0-60 52.3 25.7% 45.6 29% 91.7 44.5% 60-90 57.1 28% 54.0 34.4% 62.5 30.3% 70-100 58.7 28.8% 53.0 33.7% 53.3 25.8% 90-120 56.9 27.9% 41.4 26.3% 34.8 16.9% 0-90 109.4 53.6% 99.6 63.4% 154.3 74.8% 90-180 94.6 46.4% 57.5 36.6% 51.9 25.2% Tables 11 and 12 show the illuminance of the XM-L EZW B10 lamp at various distances compared to that of incandescent and CFL examples. Table 11: Center beam comparison Distance Incandescent CFL XM-L EZW 1.7 ft 0.5 m 6.42 fc 69.1 lux 3.68 fc 39.6 lux 12.27 fc 132.1 lux 3.3 ft 1.0 m 1.61 fc 17.3 lux 0.92 fc 9.9 lux 3.07 fc 33.0 lux 5.0 ft 1.5 m 0.71 fc 7.6 lux 0.41 fc 4.4 lux 1.36 fc 14.6 lux 6.7 ft 2.0 m 0.40 fc 4.3 lux 0.23 fc 2.5 lux 0.77 fc 8.3 lux 8.3 ft 2.5 m 0.26 fc 2.8 lux 0.15 fc 1.6 lux 0.49 fc 5.28 lux 10.0 ft 3.0 m 0.18 fc 1.9 lux 0.10 fc 1.1 lux 0.34 fc 3.7 lux Table 12: Beam width comparison Incandescent (a) Distance CFL (b) XM-L EZW (c) XM-L EZW (d) 1.7 ft 0.5 m 0.1 ft 0.03 m 3.8 ft 1.2 m 17.7 ft 5.4 m 31.8 ft 5.4 m 3.3 ft 1.0 m 0.2 ft 0.06 m 7.6 ft 2.2 m 35.5 ft 10.8 m 63.6 ft 19.4 m 5.0 ft 1.5 m 0.3 ft 0.09 m 11.4 ft 3.5 m 53.2 ft 16.2 m 95.4 ft 29.1 m 6.7 ft 2.0 m 0.5 ft 0.15 m 15.1 ft 4.6 m 71.0 ft 21.6 m 127.1 ft 38.7 m 8.3 ft 2.5 m 0.6 ft 0.18 m 18.9 ft 5.8 m 88.7 ft 27.0 m 158.9 ft 48.4 m 10.0 ft 3.0 m 0.7 ft 0.21 m 22.7 ft 6.9 m 106.4 ft 32.4 m 190.7 ft 58.1 m a Horizontal spread: 4.0° b Beam spread: 97.2° c Vertical spread: 158.7° d Horizontal spread: 168.0° Cree acknowledges that, as implemented, these B10 lamps have a slightly greater length than a typical B10 lamp. We believe that design adjustments can be made, such as a custom heat sink, to achieve the typical B10 form factor while retaining the electrical and photometric performance illustrated in this proof of concept. Copyright © 2011-2016 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree®, XLamp® and EasyWhite® are registered trademarks and the Cree logo is a trademark of Cree, Inc. ENERGY STAR® is a registered trademark of the U.S. Environmental Protection Agency. Other trademarks, product, and company names are the property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship or association. For product specifications, please see the data sheets available at www.cree.com. For warranty information, please contact Cree Sales at [email protected]. 17 XLamp ® B10 CANDELABRA Reference Design Conclusions This reference design demonstrates possibilities for designing a 25‑W equivalent B10 lamp that uses a single Cree XLamp XM-L EZW, XM-L HVW, or XT-E HVW LED. Using two XT-E HVW LEDs provides increased performance while taking advantage of the LED’s high voltage capability. This design also demonstrates the possibility of designing a 40-W equivalent B10 lamp using a single XM-L HVW LED. Compared to the XM-L EZW LED, the high voltage LEDs enable the use of physically smaller yet more efficient drivers. The use of this small number of LEDs lowers system costs and the small footprint of these LEDs simplifies fitting the lamp components in the compact B10 form factor. The innovative lamp design, industry‑best LED‑to‑LED color consistency, and high lumen output combine to make this a design for successful 25- and 40‑W equivalent, omnidirectional, B10‑replacement lamps. Special thanks Cree would like to acknowledge and thank iWatt, Inc. and Power Integrations for their collaboration on this reference design. Reliance on any of the information provided in this Application Note is at the user’s sole risk. Cree and its affiliates make no warranties or representations about, nor assume any liability with respect to, the information in this document or any LED-based lamp or luminaire made in accordance with this reference design, including without limitation that the lamps or luminaires will not infringe the intellectual property rights of Cree or a third party. Luminaire manufacturers who base product designs in whole or part on any Cree Application Note or Reference Design are solely responsible for the compliance of their products with all applicable laws and industry requirements. Copyright © 2011-2016 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree®, XLamp® and EasyWhite® are registered trademarks and the Cree logo is a trademark of Cree, Inc. ENERGY STAR® is a registered trademark of the U.S. Environmental Protection Agency. Other trademarks, product, and company names are the property of their respective owners and do not imply specific product and/or vendor endorsement, sponsorship or association. For product specifications, please see the data sheets available at www.cree.com. For warranty information, please contact Cree Sales at [email protected]. 18