October 26, 2015 Citizen Electronics Co., Ltd. Development of LED for lighting, ‘COB Series, Version 5’ - Reducing thermal resistance by 35 % of that of the current model - Citizen Electronics Co., Ltd. (Head Office: Fujiyoshida City, Yamanashi Prefecture. President: Yoshihiro Gohta) has developed LEDs for lighting, “COB *1 Series, Version 5,” by improving performance of our current models. The products will be exhibited during the ‘Hong Kong International Lighting Fair 2015’ starting on October 27, 2015. LED packages for lighting, ‘COB Series, Version 5’ Series: 4 series and 13 types Maximum luminous flux: 29 lm to 64,184 lm (0.2 W to 526 W) Applications: LED bulbs, downlights, streetlights, floodlights, stadium lighting, etc. Mass production is scheduled to start in January 2016 CLU028 Series CLU038 Series CLU048 Series CLU058 Series ◆Main features 1. Luminous efficacy and luminous flux have been improved by up to 7 % respectively over those of the current model Luminous efficacy and luminous flux have been improved by up to 7 % over those of the current model through enhancement of light extraction efficiency and heat dissipation. * Comparison of the two models below made when they light up under the same conditions (3000K, Ra 80 min., Tj=85ºC) New product: Current model: Luminous flux 3,586 lm 3,389 lm [about 6 % increase] Luminous efficacy 144 lm/W 136 lm/W [about 6 % increase] Product code CLU038-1208C4 CLU036-1208C1 2. Thermal resistance has been reduced 35 % of that of the current model As a result of improvement in manufacturing accuracy, thermal resistance has been reduced by 35 % of that of the current model. New product: Current model: Thermal resistance 0.51 ºC /W 0.78 ºC /W [about 35 % reduction] Product code CLU038-1208C4 CLU036-1208C1 As a result of the reduction in thermal resistance, the following advantageous effects can be expected: 1) Luminous flux is increased due to decrease in Tj value (junction temperature). 2) As a result of the range of temperature at which the products can be used being increased, the range of driving power is also increased 3) Heat sink can be miniaturized while the same luminous flux as that of the current model is retained. ◆Main specifications (5,000K, Ra 80 min., Tj=85ºC) Series Product name Size (mm) Power (W) Maximum luminous flux (lm) Color temperature (K) CLU028 Series CLU028-1201 CLU028-1202 CLU028-1203 CLU028-1204 CLU038 Series CLU038-1205 CLU038-1206 CLU038-1208 CLU038-1210 CLU048 Series CLU048-1212 CLU048-1812 CLU048-1818 CLU058 Series CLU058-1825 CLU058-3618 13.5×13.5×1.4 19.0×19.0×1.4 28.0×28.0×1.4 38.0×38.0×1.4 0.2–39.2 0.8–98.0 1.9–263.8 6.0–526.0 29–4,383 146–10,973 350–29,726 1,288–60,579 Ra 70 min. (ANSI C78.377): 3,000K, 4,000K, and 5,000K Ra 80 min. (3-Step MacAdam ellipse): 2,700K, 3,000K, 3,500K, 4,000K, 5,000K, and 6,500K Ra 90 min. (3-Step MacAdam ellipse): 2,700K, 3,000K, 3,500K, and 4,000K Ra 97 Typ. (3-Step MacAdam ellipse): 2,700K, 3,000K, and 4,000K Below B.B.L. (3-Step MacAdam ellipse): 2,700K, 3,000K, and 3,500K Applications Bulb Spot light Down light High bay Street light Flood light Stadium light *1 COB: stands for Chip on Board and is a structure where LED dies are directly mounted on a board. ”CITILED The Light Engine” is a brand name of LEDs for lighting manufactured by CITIZEN ELECTRONICS CO., Japan. CITILED is a registered trademark of CITIZEN ELECTRONICS CO., Japan. Ref.CE-P3345 10/15