Halogen light pin socket bulb reflector lamp energy rating d power 50 watt energy consumption 50 kwh1000h equivalent to light bulb 250 w socket gy6 35 voltage 12 v light colour warm white light output 1 000 lumen colour temperature 2 700 k beam angle 60 lifespan 4 000 h bulb shape reflector length 45 mm diameter 51 mm average annual electricity cost 01951 kwh 976 euros source average electricity cost based on figures from eurostat as