Light banding and function issues

Hey Everyone,

I am not sure what the actual fix for this would be… I created a light function for some water caustics that are projecting onto a wall on the back of this house that I’ve created. The light function works well on the back of the house but is bleeding in through the walls. Also I have a multitude of lights throughout the house but I started getting a banding effect on pieces of the walls more recently. All walls and the ceiling are butted up to each other and there is no gap that I can find. Does anyone potentially know a solution off hand? Thanks in advance!
Light banding 1.jpg
Light banding 2.jpg
Water caustics bleed 1.jpg