Halogen light reflector lamp power 28 watt energy consumption 28 kwh1000h series osram halogen spot r50 eco equivalent to light bulb 40 w socket e14 voltage 230 v light colour warm white luminous intensity 410 cd lifespan 2 000 h bulb shape reflector variable intensity dimmable uv filter length 85 mm diameter 50 mm average annual electricity cost 01951 kwh 546 euros source average electricity cost based on figures from eurostat as of 2016