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 variable intensity dimmable length 136 mm diameter 124 mm average annual electricity cost 01951 kwh 1951 euros source average electricity cost based on figures from eurostat as of 201