Fluorescent light energy rating a power 11 watt energy consumption 11 kwh1000h series osram dulux s socket g23 voltage 230 v light colour warm white light output 900 lumen colour temperature 2 700 k lifespan 15 000 h bulb shape compact fluorescent tube style bulb housing variable intensity not dimmable length 235 mm diameter 35 mm average annual electricity cost 01951 kwh 215 euros source average electricity cost based on figures from e