Weird white/blueish lighting on mesh.

I was testings some railing I made out of boredom today. Since I really just wanted to get to testing the mesh then moving on to making proper textures, I made the whole texture white, another black, and the last one just some wood texture spread out across the whole UV. Now when I went to testing in game it had some weird lighting/spots on it, which is really unpleasant.

images: imgur.com/a/bmebFDq
             imgur.com/a/uU7DLrD

.package: here

Thank you for any help in advance!