Pretty much what my question asked. The lighting in my place contain many attachments, sights, guns, etc, and it causes lag. So which service is best to store objects: Lighting or ReplicatedStorage?
If the guns are given out by a server script, you should be storing the objects in ServerStorage. None of the objects in ServerStorage are replicated to the client until you copy them to the Workspace.
Put them in ReplicatedStorage if you are cloning the weapons from a LocalScript.