E27 10w led bulb dual colour can change the luminous colour from warm white 2 700 k to universal white 4 000 kthe bulb is very energy saving and yet durable with a lifetime of up to 25 000 hours the changeable luminous colour represents the special feature of the light bulb which can be simply invoked by using the existing light switch the bulb emits light for any occasion and yet can be dimmed thus creating versatile lighting effects characteristics can emit two luminous colours wa