Halogen light golf ball bulb energy rating c power 30 watt energy consumption 30 kwh1000h series osram halogen classic p eco equivalent to light bulb 40 w socket e14 voltage 230 v light colour warm white light output 405 lumen colour temperature 2 700 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 585 euros source