When I save out as a PNG/JPG it looks exactly like the render. However when I save out as a TIff it comes out darker than my render. I assumed this was a gamma issue. I tried changing my Gamma settings in the Redshift ROP but nothing seems to fix the problem.

Anyone have any other ideas?

If you're saving out floating point TIFF images, they're going to remain linear regardless of your gamma settings, and your viewing software isn't automatically applying an sRGB gamma profile to that image. If you open up the render in Photoshop or After Effects or whatever and apply a gamma adjustment of 2.2 it should match what you see in Redshift, unless you're using some other specific OCIO configuration.

I understand thank you for the response.

P.S. I recently stumbled on MOPS and I love it! Thank you.