While playing ST#17 I noticed that the distance you can see a lit flashlight is very low, probably between 50 and 100 meters. I assume this is because the light source is being culled along with the item, but thats just a guess. I think light sources like this should still be visible at least 2-300m even if the item is culled, and hopefully further when viewed through long range scopes.
Included is reference images of me attempting to lure players into the military camp at NWAF with a flashlight, but in my original overwatch position I cannot see the flashlight at all, so I cannot tell if the batteries run dead or is turned off by a player