Energy saving bulb energy rating a power 18 watt energy consumption 18 kwh1000h series osram dulux intelligent facility equivalent to light bulb 75 w socket e27 voltage 230 v light colour warm white light output 1 050 lumen colour temperature 2 500 k lifespan 20 000 h bulb shape compact fluorescent tube style bulb housing variable intensity not dimmable length 140 mm average annual electricity cost 01951 kwh 351 euros source average ele