Halogen light pin socket bulb energy rating d power 40 watt energy consumption 40 kwh1000h series osram halopin superstar osram halopin socket g9 voltage 230 v light colour warm white light output 490 lumen colour temperature 2 700 k lifespan 2 000 h style glass bulb variable intensity dimmable mercury free length 43 mm diameter 14 mm average annual electricity cost 01951 kwh 78 euros source average electricity cost based on figures fr