AssetBundles question. Unity 5.2

Worked with AssetBundles and i have some question. Unity 5.2.3.

Example:

I have two assetbundles, first Level, second Content. Level use assets from Content and contain only scene. Content contains assets such as walls, doors, lamps, car and etc.

I need, for example, add Halo component for lamp. So, i added it in Editor, after that rebuild Content assetbundle. Copied it to folder with Level assetbundle. Running the game, loading Content and Level assetbundle. Loading scene from Level and see no Halo component on lamp.

If i changed mesh on lamp, its changed on scene from Level, too. Also everything good when i just instantiate prefab lamp from Content assetbundle and it have new Halo component, but not on scene from Level.

I guessing, scene have its own lamp object, which only depends on main assets from Content, such as Mesh, Textures, Materials, but not loads prefab settings, what components prefab have or what Halo component settings have.

So i thought it should be works the same like in a Editor, when changed prefab, it changed in scene. But it is not or i am wrong and don't know how it should be.

I know what, when rebuild Content, it rebuilds and Level, because it depends on Content. It means, when i change Content, i should rebuild all assetbundles which depends on it, again.

Question:

Why scene from Level assetbundle don't loads full prefab, but only loads some assets?

Can i just change Content without rebuilding all assetbundles with scenes and how?

Thanks!