Energy saving bulb daylight bulb golf ball bulb energy rating a power 100 watt energy consumption 100 kwh1000h series ecozone biobulb socket b22 voltage 230 v light colour daylight white light output 1 600 lumen colour temperature 6 500 k lifespan 10 000 h bulb shapes spiral tube golf ball style bulb housing length 130 mm average annual electricity cost 01951 kwh 1951 euros source average electricity cost based on figures from eurostat as