Question

Do Brown Dwarfs emit visible light?

Answer 1

Yes, very dimar. The glow is usually reddish rather than brown.

Explanation:

Brown dwarfs are warmed by cgavitational compression and a small amount of fusion involving deuterium and lithium nuclei (but not fusion of protons which powes full-fledged stars). The emit mostly infrared radiation but we can see a visible glow through telescopes. See https://en.wikipedia.org/wiki/Brown_dwarf.