Energy saving bulb energy rating a power 11 watt energy consumption 11 kwh1000h series osram duluxstar mini twist equivalent to light bulb 55 w socket e27 voltage 230 v light colour warm white light output 660 lumen colour temperature 2 700 k lifespan 6 000 h bulb shape spiral tube style bulb housing variable intensity not dimmable length 95 mm average annual electricity cost 01951 kwh 215 euros source average electricity cost based on