Energy saving bulb daylight bulb golf ball bulb energy rating a power 15 watt energy consumption 15 kwh1000h series sylvania mini lynx fast start socket e27 voltage 230 v light colour daylight white light output 850 lumen colour temperature 6 000 k lifespan 15 000 h bulb shape compact fluorescent tube length 115 mm average annual electricity cost 01951 kwh 293 euros source average electricity cost based on figures from eurostat as of 2016