Halogen light pin socket bulb reflector lamp power 35 watt energy consumption 35 kwh1000h series osram decostar 35 socket gu4 voltage 12 v light colour warm white light output 3 000 lumen luminous intensity 5 000 cd colour temperature 3 000 k beam angle 10 lifespan 2 000 h bulb shape reflector variable intensity dimmable diameter 35 mm average annual electricity cost 01951 kwh 683 euros source average electricity cost based on figures