The big thing to understand about racks is they are very sensitive to room temps. Typically they need 78 at the low end and 83 on the high end. Outside of this they often have issues and need to be specifically designed for it.

I don't think there are lights I think it is just a flash from the camera. I suppose you could use LED lighting although I don't see any point to it. Racks are about functionality and not much else.