Product family datasheet Low-voltage over-pressure lamps for 10 V systems, road traffic Areas of application _ Road traffic signalling systems __ Product benefits _ Much higher luminous efficacy than high-voltage signal lamps _ Clearly improved lamp quality due to higher gas pressure and inert gas filling _ Leads to reduced power consumption of the signal installation _ High resistance against shock and vibration compared to high-voltage lamps _ Max. premature failure rate: 2 % up to 4,400 h (related to lamp failures only) _ Retrofit for 230 V systems (replace lamp and reflector and install transformator) May 25, 2016, 17:21:50 Low-voltage over-pressure lamps for 10 V systems, road traffic © 2016, OSRAM GmbH. All rights reserved. Page 1 of 4 Product family datasheet Product line drawing __ May 25, 2016, 17:21:50 Low-voltage over-pressure lamps for 10 V systems, road traffic © 2016, OSRAM GmbH. All rights reserved. Page 2 of 4 Product family datasheet Technical data Electrical data Photomet rical data Dimensions & weight Capabilities Product description Nominal wattage Nominal voltage Test voltage Nominal luminous flux Diameter Overall length Light center length (LCL) Burning position SIG 1227 22.00 W 10.0 V 10.5 V 270 lm 36.0 mm 67.0 mm 31.0 mm 1) s135 2) SIG 1238 30.00 W 10.0 V 10.5 V 400 lm 36.0 mm 67.0 mm 31.0 mm 1) s135 2) Country specific categorizations __ Product description Order reference SIG 1227 SIG 1227 UE CL SIG 1238 SIG 1238 UE CL 1) Distance from the coil to the lug of base 2) Lamps with transverse filament should be preferred inclined perpendicular to the filament plane May 25, 2016, 17:21:50 Low-voltage over-pressure lamps for 10 V systems, road traffic © 2016, OSRAM GmbH. All rights reserved. Page 3 of 4 Product family datasheet Safety advice Use only in signal equipment/luminaires that are specially designed for the purpose. Protect the lamps against moisture during operation and installation. Application advice For more detailed application information and graphics please see product datasheet. Disclaimer Subject to change without notice. Errors and omission excepted. Always make sure to use the most recent release. __ May 25, 2016, 17:21:50 Low-voltage over-pressure lamps for 10 V systems, road traffic © 2016, OSRAM GmbH. All rights reserved. Page 4 of 4