Energy saving bulb energy rating a power 23 watt energy consumption 23 kwh1000h series osram superstar micro twist equivalent to light bulb 112 w socket e27 voltage 230 v light colour warm white light output 1 600 lumen colour temperature 2 500 k lifespan 12 000 h bulb shape spiral tube style bulb housing variable intensity not dimmable length 120 mm average annual electricity cost 01951 kwh 449 euros source average electricity cost bas