Fluorescent light energy rating a power 21 watt energy consumption 26 kwh1000h series osram substitube basic socket g13 voltage 220 v light colour neutral white light output 2 100 lumen colour temperature 4 000 k beam angle 150 lifespan 40 000 h bulb shape tube light variable intensity not dimmable mercury free length 1 213 mm diameter 28 mm average annual electricity cost 01951 kwh 507 euros source average electricity cost based o