Halogen light oven light reflector lamp power 20 watt energy consumption 20 kwh1000h series philips aluline socket ba15d voltage 12 v light colour warm white colour temperature 3 000 k beam angle 32 lifespan 2 000 h bulb shape reflector diameter 37 mm average annual electricity cost 01951 kwh 39 euros source average electricity cost based on figures from eurostat as of 2016