How to create multiplayer flashlight for my multiplayer horror game?

How to create multiplayer flashlight for my multiplayer horror game?
Please help!

Meaning that you want flashlight similar to camera flash?
If yes,then it could be constructed by light attenuation shader and some ghost appearance scripts. Let me think, you need something like these:

A flash light appear and you see some sudden object(ghost basically or dead body come in). Sudden object may disappear after a while or not.

Light attenuation shader documentation can be found HERE
And sudden appearance can be accomplished with the help of THIS I believe. Don’t ask me details because I haven’t done any horror things. But I believe that is a pretty way.

Graphical tips: Paint a lot of specular highlight sothat things might look beautiful when flashing occurs.