Luminaria Aurantiacus, from Latin for 'light' and 'orange', is a bioluminescent fungus in the Pyroglow Ignis cluster, family Physalacriaceae, genus Luminaria. It has clustered fruiting bodies 0-15 cm tall with glossy, convex to slightly umbonate orange-amber caps, densely packed adnate gills, and creamy fibrous stipes. Its semi-translucent integument features fine fibrils and wart-like structures. Bioluminescence occurs at 470-530 nm via a luciferin-luciferase system, emitting blue-green light on gills and cap margins to aid nocturnal spore dispersal. Saprotrophic, it decomposes tropical forest wood and leaf litter at 5-25°C, contributing to nutrient cycling and carbon recycling with an extensive white mycelial network. Spore dispersal is wind-mediated from elevated caps and exposed gills, supporting ecosystem dynamics in tropical substrates.