Triboluminescence

Triboluminescence

Produces light from Scratching / Rubbing certain crystals together  

Eg. Pop-rocks and sugar

Chemiluminescence

Production of light from a chemical reaction

Eg. glow sticks

Bioluminescence

Production of light by living organisms, such as fireflies and certain fungi.

Fluorescence

Production of light immediately that releases visible light from UV light

Eg. Florescence light bulb

Incandescence

Production of light from heat, as seen in traditional light bulbs.

Electric discharge

The process of producing light by passing an electric current through a gas, resulting in a glow as seen in neon signs and fluorescent tubes.

Phosphorescence

A process where materials absorb light and re-emit it over time, producing a glow that lasts longer than fluorescence. Commonly seen in glow-in-the-dark products.

L E D s

Light produced by electricity travelling through the semiconductor

Lasers

A light source that goes in one direction