Fluorescent light energy rating b power 8 watt energy consumption 8 kwh1000h series osram lumilux t5 socket g5 voltage 230 v light colour neutral white light output 385 lumen luminous intensity 5 600 cd colour temperature 4 000 k lifespan 4 500 h bulb shape tube light diameter 16 mm average annual electricity cost 01951 kwh 156 euros source average electricity cost based on figures from eurostat as of 2016