TrueLight
Concept — Cosmic Force
Considered the highest form of light. Includes light from Eyru, light of the Sun, and light from flame and burning things. Source of creation for the Highborn and Kinsfolk — an objective, pre-material force.
Cannot be destroyed or created artificially. Burns corruption and corrupted beings away.
Effects on Dark Beastlings
TrueLight burns the skin and husk of Dark Beastlings on contact (much like sunlight on a vampire), but low levels will not kill them outright. Only intense or sustained TrueLight is lethal.
Cultural & Metaphorical Use
Also used metaphorically to signify the highest form of good. In speech and song, calling something "TrueLight" is an extreme compliment. Example: "Your voice in that song was TrueLight itself."