Halogen light golf ball bulb energy rating d power 18 watt energy consumption 18 kwh1000h series osram halogen classic p eco equivalent to light bulb 20 w socket e14 voltage 230 v light colour warm white light output 160 lumen colour temperature 2 800 k lifespan 2 000 h bulb shape golf ball style glass bulb variable intensity dimmable uv filter length 80 mm diameter 45 mm average annual electricity cost 01951 kwh 351 euros source