Energy saving bulb energy rating a power 11 watt energy consumption 11 kwh1000h series osram duluxstar stick equivalent to light bulb 50 w socket e27 voltage 230 v light colour warm white light output 600 lumen colour temperature 2 500 k lifespan 10 000 h bulb shape compact fluorescent tube style bulb housing variable intensity not dimmable length 125 mm diameter 44 mm average annual electricity cost 01951 kwh 215 euros source averag