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 1 100 cd colour temperature 2 900 k beam angle 25 lifespan 2 500 h bulb shape reflector uv filter length 110 mm diameter 80 mm average annual electricity cost 01951 kwh 976 euros source average electricity cost based on figures from eurostat as of 2016