Fluorescent light energy rating a power 18 watt energy consumption 18 kwh1000h series philips master tl d super 80 socket g13 light colour warm white light output 1 350 lumen colour temperature 2 700 k lifespan 15 000 h bulb shape tube light diameter 26 mm average annual electricity cost 01951 kwh 351 euros source average electricity cost based on figures from eurostat as of 2016