Fluorescent light energy rating b power 57 watt energy consumption 57 kwh1000h series philips master pl t socket gx24q light colour neutral white light output 4 300 lumen colour temperature 4 000 k lifespan 7 000 h bulb shape compact fluorescent tube style bulb housing variable intensity dimmable average annual electricity cost 01951 kwh 1112 euros source average electricity cost based on figures from eurostat as of 2016