Halogen light reflector lamp power 20 watt energy consumption 20 kwh1000h series philips aluline socket b15d voltage 12 v light colour warm white luminous intensity 6 400 cd colour temperature 3 000 k beam angle 6 lifespan 2 000 h bulb shape reflector variable intensity dimmable diameter 37 mm average annual electricity cost 01951 kwh 39 euros source average electricity cost based on figures from eurostat as of 2016