Halogen light pin socket bulb power 7 watt energy consumption 7 kwh1000h series osram halostar eco socket g4 voltage 12 v light colour warm white light output 105 lumen colour temperature 2 800 k lifespan 4 000 h variable intensity dimmable uv filter length 33 mm diameter 10 mm average annual electricity cost 01951 kwh 137 euros source average electricity cost based on figures from eurostat as of 2016