Trope-a-Day: Fantastic Light Sources

Fantastic Light Sources: Unusual light sources include the fancy “sourceless glow”, or “light-cloud cyberswarm” which is basically a hovering cloud of tiny glowing microbots; and gratuitous use of bioluminescence, from the mundane glowing spheres of microbes in solution used as non-power-dependent emergency lighting, through the bioluminescent organ-strips inside the organic cities of Kythera, to all the fancy and artistically-designed lamppost-trees and other constructs used for aesthetic value as much as illumination.

And, of course, in the pre-electrical era, the prevalence of assorted alchemical “chymelights” to provide light without fire, and thus also without inconvenient degrees of heat and smoke.