adjective / noun
radiant
RAY-dee-unt/ˈreɪdiənt/
Sending light or energy outward from a source.
The radiant bulb casts light on the objects around it.

Etymology
Radiant expresses the ongoing action of beaming or shining. The physical image of giving off light extended to heat and to the apparent glow of beauty or happiness.
In context
Alan assures the guide that Ifrit is protecting them, then draws a radiant blade of light and faces the unseen threat.
More examples
- Solar panels convert radiant energy from sunlight into electricity.
- Radiant heaters warm nearby objects without blowing hot air.
- The sun is a radiant source of light and heat.