Halogen light pin socket bulb reflector lamp power 20 watt energy consumption 20 kwh1000h series osram decostar 51 eco equivalent to light bulb 35 w socket gu5 3 voltage 12 v light colour warm white luminous intensity 450 cd colour temperature 3 000 k beam angle 60 lifespan 5 000 h bulb shape reflector style bulb housing variable intensity dimmable uv filter length 45 mm diameter 51 mm average annual electricity cost 01951 kwh 39 e