Streaming parts of a level into the scene

Hi, I have Unity 5.4.0b19 and have built a big level, what I'd like to do is split the level into smaller pieces and dream them in when needed. What I've done so far is to do is divide the level into smaller pieces and put them into new scenes, Scif_Scene_01 Scif_Scene_02 .. ect and all the scene's are in theHierarchy. I have a don't destroy on load manager that at the Awake() loads the player, pool manager, EventSystem and anything else I need to carry over. What I'd like to know is if I'm doing it correctly. Like I said I have split the big level into smaller pieces and pasted them into scenes, then at the end of each piece of the level I have a collider that is triggered when the player walks into it and then the next piece of the level is loaded with SceneManager.LoadScene("SciFi_Scene_02"); .. ect Does each scene's ambient lighting and skybox need to be set the same or can I have 1 light setting to control all the scene's? Does each scene have occlusion culling done separately or do I occlusion culling on the whole level before splitting it into smaller scene's? Or is my way of doing it completely wrong? I'd really appreciate any advice .. Thanks.