Fluorescent light energy rating b power 40 watt energy consumption 40 kwh1000h series philips master pl l socket 2g11 light colour warm white light output 3 500 lumen colour temperature 3 000 k lifespan 15 000 h bulb shape compact fluorescent tube average annual electricity cost 01951 kwh 78 euros source average electricity cost based on figures from eurostat as of 2016