Fluorescent light energy rating a power 58 watt energy consumption 58 kwh1000h series osram lumilux t8 osram active socket g13 voltage 230 v light colour neutral white light output 5 200 lumen colour temperature 4 000 k lifespan 20 000 h bulb shape tube light style glass bulb colour rendering index ra 80 ra length 1 500 mm diameter 26 mm average annual electricity cost 01951 kwh 1132 euros source average electricity cost based on fig