Led bulb energy rating a power 4 watt energy consumption 4 kwh1000h series philips master ledluster equivalent to light bulb 25 w socket e14 voltage 230 v light colour warm white light output 250 lumen colour temperature 2 700 k lifespan 20 000 h variable intensity dimmable colour rendering index ra 80 ra length 85 mm diameter 46 mm average annual electricity cost 01951 kwh 078 euros source average electricity cost based on figures f