Energy saving bulb daylight bulb golf ball bulb energy rating a power 20 watt energy consumption 20 kwh1000h series philips master pl electronic equivalent to light bulb 87 w socket e27 voltage 230 v light colour daylight white light output 1 175 lumen colour temperature 6 500 k lifespan 12 000 h bulb shape golf ball average annual electricity cost 01951 kwh 39 euros source average electricity cost based on figures from eurostat as of 2016