Golf ball bulb led bulb energy rating a power 4 watt energy consumption 4 kwh1000h equivalent to light bulb 25 w socket e14 voltage 230 v light colour warm white light output 250 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 85 ra length 85 mm diameter 43 mm average annual electricity cost 01951 kwh 078 euros source