Multiple lightmaps / 1 scene

Hi, at the moment I have a lot of questions ^ ^.

I wanted to get your opinion on a method that I intended to put in place and whether it was viable. I counted used lightmaps from different scene in the same scene.

For this, I bake my lightmaps counted so that a stage has held in one or two textures lightmaps. (I have a dozen scenes) At the time of each bake I make sure that the atlas is locked for not editing on the previous one.

The content of the scene I bake is contained in a prefab for each one.

When launching a part of my game, the player has a choice between 10 levels (and therefore 10 different scenes) when loading my prefab in the scene that only serves me to load all my levels I intended to call my lightmap(s) according to the prefab load.

Is that possible or lightmaps are associated with a single stage?

If yes, I thought bake and stored them in the Resources folder to be able to access it when I want and each wholesale store them in a folder corresponding to the name of each prefab to find them easily and dynamically load their info tilling / offset in LightmapSettings. Is that possible too?

Me what course would suit me is that the table lightmap is shared between all the scenes ^^ (but I do not think that is the case)

Otherwise latter, I bake my lightmaps in the scene where I call and not each in a different stage. Hence my scene called (level) contain all the information of my lightmaps and can be retrieved easily at each stage of loading prefab by making a link between the index of the lightmap in the atlas and current index prefab.

Here, if I was not clear, let me know. Otherwise all your comments and opinions are welcome.