Grow-a-light sticks

A glow stick is a self-contained, short-term light-source. It consists of a translucent plastic tube containing isolated substances that, when combined, make light through chemiluminescence, so it does not require an external energy source. The light cannot be turned off, and can be used only once. Glow sticks are often used for recreation, but may also be relied upon for light during military, police, fire, or EMS operations.

They are virtually unchanged since their invention in Pre Astro Earth Times. Modern improvements include great increase of light strength and duration.

1. A plastic casing covers the inner fluid. 2. A glass capsule covers the solution. 3. Phenyl oxalate and fluorescent dye solution 4. Hydrogen peroxide solution 5. After the glass capsule is broken and the solutions mix, the glowstick glows