Halogen light reflector lamp power 28 watt energy consumption 28 kwh1000h series philips ecoclassic30 nr50 socket e14 voltage 230 v light colour warm white colour temperature 2 800 k beam angle 30 lifespan 2 000 h bulb shape reflector variable intensity dimmable diameter 50 mm average annual electricity cost 01951 kwh 546 euros source average electricity cost based on figures from eurostat as of 2016