I like the mismatched lights personally. It creates the illusion of shadows created by the forest/jungle canopy. I only use a single 18" Marineland LED on my 6 foot tank. I have it mounted over the right 3rd of the tank so that the entire left side is in shadow and so is the right edge. It creates a lot of dim or shaded areas that the fish enjoy hanging out in and where there is light it's bright enough to grow sword plants.
Your tank is looking really good. Did you use a specific paint, like Krylon Fusion, to paint the trim black?