Led bulb energy rating a power 38 watt energy consumption 4 kwh1000h series osram classic b equivalent to light bulb 37 w socket e14 voltage 230 v light colour warm white light output 430 lumen colour temperature 2 700 k lifespan 15 000 h bulb shape candle style glass bulb number of leds 1 variable intensity not dimmable colour rendering index ra 80 ra length 99 mm diameter 35 mm average annual electricity cost 01951 kwh 078 e