Model too dark even with global light

I made a model and added some textures to it in Substance Painter and imported it into UE4
But for some reason it’s too dark even though there is a sky light.
I try adding some spot lights to it but it looks so dark with all the light absorbed. Here are some pictures:
Imgur: The magic of the Internet ; Imgur: The magic of the Internet
Hope I get some quick tips. thank you!

Your materials look really shiny. It might look brighter if it was less shin and scattered a little more light.

I believe I didn’t uncheck the RGB box for materials, fixed the problem a bit, thanks anyways!