Archivist note: This article is from an older recovered archive and might be obsolete or in need of updating.
Most recent revision is shown below, by Aeolus.Cleanslate.
Illuminum is a ceramic compound of aetherically-infused silicates that emits a steady greenish-blue glow for several years. Illuminum can be cast into tiles or painted on as a glaze.
Illuminum is created when silicate crystal particles (from amethyst or jasmium) are passed through an aetherically-charged centrifuge, forcing the heavier particles to the outside and allowing their core structures to be excited with aetheric properties. The result is a powdered crystal substance that glows with its own internal light. The degree and duration of the light is a function of the duration of centrifugal activity and the quality and quantity of aether added. Iluminum’s light-emitting characteristics are generally measured in half-lives, and range from ten to fifty years. The light is seldom strong, but is durable and consistent.
Illuminum finds applications in areas where gaslight or other means of illumination are impractical. Highly combustible phlogiston mines use illuminum strips painted along the cavern walls. Undersea emplacements use the strips outside pressurized areas for safety purposes. Attempts have been made to focus the light emitted by convex illuminum ingots through lenses to provide brighter, more focused lights, with some success.
((From Altered Carbon, by Richard Morgan, 2003))
The walls and ceiling bore an irregular spacing of illuminum tiles whose half-life was clearly almost up, and their feeble radiance had the sole effect of shoveling the gloom into the center of the room.