The white light will not shine when power is low. Touch the metal ring at the bottom of the moon lamp to turn on / off the light and change color from white to yellow. It’s fun to hold it in hand or on wood holder. Both kids and adults love it. And it can even create romantic atmosphere for your room. Comfortable brightness : The lamp contains a matte finish on the outside so the light emitted is not too dark or too bright. The warm white and cool white options make the lamp ideal for a soft glow to create an ambiance or as a nightlight for little children. Size: Diameter 15cm.