Fluorescent light energy rating a power 9 watt energy consumption 9 kwh1000h series philips master pl s socket g23 light colour neutral white light output 600 lumen colour temperature 4 000 k lifespan 7 000 h bulb shape tube light style glass bulb variable intensity not dimmable colour rendering index ra 82 ra length 167 mm diameter 28 mm average annual electricity cost 01951 kwh 176 euros source average electricity cost based on figu