How do I import lights and lightmaps into a scene?

I created a scene in unity and exported it as a package for others to work on. All assets, meshes, materials etc. were exported, but no lights or lightmaps.

How do I export/save a level that can be transferred with it's lights and lightmaps? If they cannot be exported, can the be referencing or kinda stealing the light info from another scene? I don't want to duplicate each light and copy the settings from each one by hand.

It would be fine if there's a light exporter in the asset store or something.