Halogen light energy rating c power 60 watt energy consumption 60 kwh1000h series osram halolux eco equivalent to light bulb 75 w socket b15d voltage 230 v light colour warm white light output 980 lumen colour temperature 2 900 k lifespan 2 000 h bulb shape tubular style glass bulb mercury free length 70 mm diameter 13 mm average annual electricity cost 01951 kwh 1171 euros source average electricity cost based on figures from eurosta