Huge beetle with glowing red organs that provide illumination

Giant fire beetles are huge, being 18 to 30 inches long, and have shiny black carapaces. Each has a pair of glowing red organs located just below their eyes which illuminate a radius of 10 feet around the creature. These glands continue to glow for 1d6 days after one is killed, and may be removed and used for illumination by any adventurers not too squeamish to do so. They are normally timid but will fight if cornered. Like most beetles, they have more or less the same visual acuity in all directions, and thus those who attack them from behind receive no bonus to do so.

Nocturnal beetle with glowing red glands sought after for illumination

With their glowing red glands, one above each eye and one on the back of the abdomen, these nocturnal beetles are much sought after by adventurers. The glands will continue to glow for 1d6 days after removal, illuminating a 10-ft radius without fail. Fire beetles can be found both above and below ground, feeding on decaying matter like all beetles.