Yes, I know that Moonwalker already has made a glowstick, but my idea is slightly different. If you're reading this, Moonwalker, consider adding this feature to your mod.
It would work like Moonwalker's, except you could throw it like a grenade, deleting the item and dealing no damage. It would be nice if the glowstick projectile could stay in that place for a while (a minute, maybe an RTB pref) and emit the same glow as when you held it. That way you could set up lights in a dark area in TDMs/RPs.