Energy saving bulb daylight bulb golf ball bulb energy rating a power 11 watt energy consumption 11 kwh1000h series philips genie esaver philips eco85 genie socket e14 voltage 230 v light colour daylight white light output 570 lumen colour temperature 6 500 k lifespan 8 000 h bulb shape compact fluorescent tube style bulb housing variable intensity not dimmable average annual electricity cost 01951 kwh 215 euros source average electricity