Halogen light energy rating c power 48 watt energy consumption 48 kwh1000h series osram haloline eco socket r7s voltage 230 v light colour warm white light output 815 lumen colour temperature 2 900 k lifespan 2 000 h bulb shape halogen rod style glass bulb variable intensity dimmable length 78 mm diameter 12 mm average annual electricity cost 01951 kwh 936 euros source average electricity cost based on figures from eurostat as of 2016