Daylight bulb fluorescent light golf ball bulb energy rating a power 16 watt energy consumption 16 kwh1000h series philips master tl d eco socket g13 light colour daylight white light output 1 225 lumen colour temperature 6 500 k lifespan 15 000 h bulb shape golf ball diameter 26 mm average annual electricity cost 01951 kwh 312 euros source average electricity cost based on figures from eurostat as of 2016