Pin socket bulb xenon bulb halogen light power 100 watt energy consumption 100 kwh1000h series osram hlx xenophot socket gy6 35 voltage 12 v light output 2 800 lumen lifespan 2 000 h variable intensity dimmable average annual electricity cost 01951 kwh 1951 euros source average electricity cost based on figures from eurostat as of 2016