I've always wanted a mod to make players not take the flashlight for granted in Left 4 Dead. It should function similar to the suit light in Half Life 2 where it would use up the aux power and you'd need to wait a bit for it to recharge. It would be cool if it would dim over time and begin to flicker until ultimately turning off when left on for too long. I would also want the flashlight to only work on the primary weapons and pistols but disable on all other items much like this
plugin. Cvars would pertain to things like the time it takes for flashlight to run out of battery, time it takes to recharge, and perhaps whether or not you can only refill flashlight with ammo pile and laser box.