Halogen light pin socket bulb reflector lamp power 40 watt energy consumption 40 kwh1000h series osram halopar eco socket gu10 voltage 230 v light colour warm white luminous intensity 900 cd colour temperature 2 800 k lifespan 2 000 h bulb shape reflector variable intensity dimmable uv filter colour rendering index ra 100 ra length 55 mm diameter 51 mm average annual electricity cost 01951 kwh 78 euros source average electricity cost