Energy saving bulb energy rating a power 20 watt energy consumption 20 kwh1000h series philips softone esaver socket b22 voltage 230 v light colour warm white light output 1 160 lumen colour temperature 2 700 k lifespan 8 000 h bulb shape standard diameter 65 mm average annual electricity cost 01951 kwh 39 euros source average electricity cost based on figures from eurostat as of 2016