Giant Fire Beetle

Small beast, unaligned
Armor Class 13 (natural armor)
Hit Points 4 (1d6 + 1)
Speed 30 ft.
STR
8 (-1)
DEX
10 (+0)
CON
12 (+1)
INT
1 (-5)
WIS
7 (-2)
CHA
3 (-4)
Senses blindsight 30 ft., passive Perception 8
Languages -
Challenge 0 (10 XP)

Illumination. The beetle sheds bright light in a 10-foot radius and dim light for an additional 10 feet.

ACTIONS

Bite. Melee Weapon Attack: +1 to hit, reach 5 ft., one target. Hit: 2 (1d6 - 1) slashing damage.

A giant fire beetle is a nocturnal creature that features a pair of glowing glands that give off light for 1d6 days after the beetle dies.
Monster Manual (SRD) D&D 5 › Monsters