Can someone explain the awkward lighting?

After playing the Halo 5 beta and Halo 2: Anniversary, I’ve noticed the lighting is a bit wierd/unnatural. For example, in Halo 2A your Spartan’s glove has this wierd pearlescent look to it and it bothers me. The same goes with Halo 5, how the Spartans look as if they are faintly glowing and have a pearlescent look. Every previous Halo title doesn’t have this problem, so I was wondering what it is.

Bloom. Halo 4 had a lot of it too.