Take one for sure, helps in the long corridors when a fire fight breaks out and your position is already given away. That distance in the dark it's hard to see where the enemy is a quick blast of ur torch and you give yourself and your team a general idea of where they are so you can start getting accurate fire down.
Been asked a good few times to send some light down as no fucker can see where anyone is, bright enough torch and you start to add a blinding effect there too for anyone looking your way