Unlike glow-in-the-dark stars that needed direct sunlight or black lights to charge, the UVPaqlite charges quickly by absorbing the light from any light source: sunlight, flourescent, halogen, LEDS, etc. Once charged these lights will provide enough light to function in a shelter, tent, or bedroom without using electricity or fuel all night long. And as long as the sun rises tomorrow, you can reuse it over-and-over again...FOREVER!!! Tooblite glow-sticks are used for many purposes. They are waterproof, do not use batteries, generate no heat, and are non-toxic. They can tolerate high pressures, such as those found underwater. They are used as light sources and light markers by military forces, campers, and recreational divers doing night diving. Glow sticks are considered the only kind of light source that is ideal safe for use immediately following an earthquake, hurricane, tornado, or other catastrophic emergency situation due to the fact that they do not use any kind of electricity to work and do not create any danger of sparking. They can also be used in night-time fishing as a lure.