Energy saving bulb energy rating a power 20 watt energy consumption 20 kwh1000h series philips master pl e stairway equivalent to light bulb 75 w socket e27 voltage 230 v light colour warm white light output 1 230 lumen colour temperature 2 700 k lifespan 20 000 h bulb shape compact fluorescent tube style bulb housing variable intensity not dimmable average annual electricity cost 01951 kwh 39 euros source average electricity cost based on