Created static mesh from combining box brushes. Totally messed up the lighting.. Help! :]

My first thought was it messed up the res and UV light maps, but I’m just a little over a week into UE4 so I wouldn’t know. This static mesh is created from about 50 box brushes @ 20x400x300 (after some research, I now know to not create static meshes from brushes this massive). Does this mean I’d have to go into 3DSM and map out the UVs myself? If so, I’m down for a new adventure, just need to know what to do to correct my mistake.

I thought about asking in the answer hub, but it seemed like too big of a question, so I came here. If there’s a more suitable place to ask these type of newbie questions, feel free to let me know!

Appreciate the community’s time!