Halogen light reflector lamp power 100 watt energy consumption 100 kwh1000h series sylvania hi spot socket e27 voltage 230 v light colour warm white luminous intensity 3 500 cd colour temperature 2 900 k beam angle 30 lifespan 3 000 h bulb shape reflector average annual electricity cost 01951 kwh 1951 euros source average electricity cost based on figures from eurostat as of 2016