Halogen light pin socket bulb reflector lamp power 28 watt energy consumption 28 kwh1000h series osram halopar eco equivalent to light bulb 40 w socket gu10 voltage 230 v light colour warm white luminous intensity 570 cd colour temperature 2 700 k lifespan 2 000 h bulb shape reflector variable intensity dimmable uv filter length 53 mm diameter 51 mm average annual electricity cost 01951 kwh 546 euros source average electricity cost bas