Contains 12 white LEDs, just clip onto a lantern. It is has an on/off switch located at the top of the light. Avoid the hassle of wires and cords by using one of these battery operated paper lantern lights. Each light features 12 super bright white LEDs and measures 3-1/2in by 1-1/2in. The light portion is 1-1/4in wide. The light hangs on the metal part of the lantern. Each requires 3 AAA batteries, not included. Each light gives 7 hours of illumination. Such a great product. Produces a tremendous amount of light.