Torch Spirits

Torch Spirits are fairly common, physically weak spirits usually less than a foot tall.  Most often, they are affiliated with Zarthus (god of the moon), Khemra (goddess of the sun) and Mera (goddess of the hearthfire) but almost all of the Nine have a few spirits that fill the basic niche.
Whether summoned by magic or visiting the mortal plane of their own volition.  Torch spirits fly and glow, and that's about it.  Torch spirits do this to let mortals see in dark places.
Somtimes they take the form of small glowing animals and sometimes they just are a literal floating orb of light.