Golf ball bulb energy rating a power 6 watt energy consumption 6 kwh1000h series osram led star 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 not dimmable mercury free colour rendering index ra 80 ra length 89 mm diameter 43 mm average annual electricity cost 01951 kwh