Energy saving bulb candle bulb energy rating a power 7 watt energy consumption 7 kwh1000h series osram dulux superstar classic b equivalent to light bulb 40 w socket e14 voltage 230 v light colour warm white light output 280 lumen colour temperature 2 700 k lifespan 10 000 h bulb shape candle style decopipe straight variable intensity not dimmable length 105 mm diameter 39 mm average annual electricity cost 01951 kwh 137 euros source