It's just such a light-emitting pen that lights up a line as long as you move it toward the ceiling. Understand that this is a ceiling-mounted LED lamp with a sensor that can be controlled freely. Through the control brush in the hand, you can draw light areas of various shapes according to your own ideas. Need a round moon, draw an arc. If you want a sun, draw a circle. Wherever we need to draw, we need to increase the area and make it bigger. Which kind of light does this point, the freedom of painting light is not to make you have a kind of pen Ma Liang feeling.