Color banding problem

Hi! I've googled this issue, and even saw a thread or two about this on here, but even after trying all suggestions I still am unable to get rid of weird color bands rather than smooth gradients in my raw photos. I'm using two colored led Pavo Tubes as a light source and so there should be a nice transition from one color to the other. But when I bring the photos into ACR I get hard lines/bands where one color stops and the next begins. After editing them in RAW and bringing them into Photoshop the bands are still there and the only way I can make them look a little better is through editing/smoothing the transiton. But there even after doing that there is still a very noticable line of color. I've attached examples of an untouched photo showing the banding as well as one of the same photo with vibrance turned down slightly which shows the banding even more, and then an edited photo still showing signs of the band. Also attached are screenshots of my settings. Please let me know if anyone knows what's going on here! Much appreciated!