Oh, yes. They even make some guns with special slots in the dust cover where you can hang a minuture flashlight. No more fumbling around in the dark trying to light the lantern. Its kinda handy for those late night trips to the outhouse, too. Just be careful where you point the flashlight if your zipper gets stuck.
They even make little pointy lights for flinty eyed ol' pharts.
PS - some things don't require much light.