When building / testing for mobile the scene renders over bright


Quick question.

I have a scene I’m working on. When I test it in the viewport and play it looks correct. However when I either run it on my Pixel or Mobile Preview, then the scene is rendered over bright. The 2 attachments show what I mean. I can see the light maps are working on the floor, as it’s a lot darker material than the walls, ceiling, etc.

I tried turning off various components, but can’t figure this one out.

Any suggestions would be great!