This is a list of sources of light, the visible part of the electromagnetic spectrum. Light sources produce photons from another energy source, such as heat, chemical reactions, or conversion of mass or a different frequency of electromagnetic energy, and include light bulbs and stars like the Sun. Reflectors (such as the. Incandescence is the emission of light from a hot body as a result of its temperature. • – Early form of lamp using an incandescent ceramic rod• • • • Luminescence is emission of light by a substance not resulting from heat. BioluminescenceBioluminescence is light resulting from biochemical reaction by a living organism. • – Species of hydrozoan• –.
