Halogen light infrared light power 350 watt energy consumption 350 kwh1000h series osram halotherm socket r7s voltage 230 v light colour warm white infrared colour temperature 2 350 k lifespan 5 000 h bulb shape halogen rod style glass bulb variable intensity dimmable length 186 mm diameter 10 mm average annual electricity cost 01951 kwh 6829 euros source average electricity cost based on figures from eurostat as of 2016