Halogen light pin socket bulb power 250 watt energy consumption 250 kwh1000h series osram hlx xenophot socket g6 35 voltage 24 v light colour neutral white light output 10 000 lumen colour temperature 3 550 k lifespan 50 h length 55 mm diameter 13 mm average annual electricity cost 01951 kwh 4878 euros source average electricity cost based on figures from eurostat as of 2016