Fluorescent light power 18 watt energy consumption 18 kwh1000h series philips master tl d socket g13 light colour daylight white light output 1 300 lumen colour temperature 6 500 k lifespan 20 000 h bulb shape tube light style glass bulb length 590 mm diameter 26 mm average annual electricity cost 01951 kwh 351 euros source average electricity cost based on figures from eurostat as of 2016