the.com/luminescence
light without heat, the universe's way of glowing instead of burning.
cold lightemits photons without thermal radiation, unlike a bulb
deep seamost deep-ocean creatures produce their own light
glowing forestssome fungi shine to lure spore-spreading insects
firefly efficiencyconverts nearly all energy to light, almost no waste heat
named speciesradium's eerie glow once decorated watch dials