Energy saving bulb energy rating a power 24 watt energy consumption 24 kwh1000h series osram duluxstar stick equivalent to light bulb 100 w socket e27 voltage 230 v light colour warm white light output 1 445 lumen colour temperature 2 500 k lifespan 10 000 h bulb shape compact fluorescent tube style bulb housing variable intensity not dimmable length 176 mm diameter 52 mm average annual electricity cost 01951 kwh 468 euros source ave