Halogen light energy rating d power 100 watt energy consumption 100 kwh1000h series osram halolux eco socket b15d voltage 230 v light colour warm white light output 1 800 lumen colour temperature 2 900 k lifespan 2 000 h bulb shape tubular style glass bulb variable intensity dimmable uv filter mercury free special feature mercury free length 86 mm diameter 13 mm average annual electricity cost 01951 kwh 1951 euros source average