Halogen light reflector lamp power 50 watt energy consumption 50 kwh1000h series sylvania hi spot socket e27 voltage 230 v light colour warm white luminous intensity 4 000 cd colour temperature 2 900 k beam angle 10 lifespan 2 500 h bulb shape reflector average annual electricity cost 01951 kwh 976 euros source average electricity cost based on figures from eurostat as of 2016