Golf ball bulb energy rating a power 6 watt energy consumption 29 kwh1000h series osram parathom classic p equivalent to light bulb 40 w socket e14 voltage 230 v light colour warm white light output 470 lumen colour temperature 2 700 k lifespan 20 000 h bulb shape golf ball style glass bulb variable intensity dimmable colour rendering index ra 80 ra length 89 mm diameter 43 mm average annual electricity cost 01951 kwh 566 euros s