Led bulb power 4 watt energy consumption 4 kwh1000h equivalent to light bulb 25 w socket g9 voltage 230 v light colour warm white light output 220 lumen colour temperature 2 800 k lifespan 25 000 h style bulb housing variable intensity dimmable colour rendering index ra 80 ra length 68 mm diameter 28 mm average annual electricity cost 01951 kwh 078 euros source average electricity cost based on figures from eurostat as of 2016