its going to have to be a dark lantern with a focused opening
Yep.
Also, my hand goes away when I take the flashlight out.
Edit: It seems you use a slow moving projectile for your flashlight to work. If I fire it quickly, I can watch as the light slowly travels down the hallway. I was hoping this was a ray cast with a light on the end of it, but no. Its about the same as what I made only with a slower projectile.
Also, the amount of lights each projectile makes hits the light cap really fast. The light trail only goes 1/5th of distance the projectile themselves go. You need to slow the fire rate, but this method will screw up all other brick lights no matter what you do.