Led bulb candle bulb power 1 watt energy consumption 1 kwh1000h socket e14 voltage 230 v light colour warm white colour temperature 2 100 k lifespan 15 000 h bulb shape candle style glass bulb length 75 mm diameter 15 mm average annual electricity cost 01951 kwh 02 euros source average electricity cost based on figures from eurostat as of 2016