Halogen light energy rating d power 40 watt energy consumption 40 kwh1000h series osram halolux t eco socket e14 voltage 230 v light colour warm white light output 490 lumen colour temperature 2 900 k lifespan 2 000 h bulb shape tubular style glass bulb variable intensity dimmable uv filter length 80 mm diameter 26 mm average annual electricity cost 01951 kwh 78 euros source average electricity cost based on figures from eurostat as