20 Gal Long programmable lighting

Hi I need some help with lighting for my 20 gallon long tank. It has 2 clown fish that have hosted a bubble tip anemone. It has a six line wrasse, 2 emerald crabs, a sand shifting starfish, 2 blue damselfish, a peppermint shrimp, a Mexican turbo snail, 4 Margarita Snail, and 4 blue legged hermits. It currently runs with a eshopps pf300 overflow box and a eshopps cube nano refugium, with some activated carbon and PhosGuard, and some Green Gracilaria Algae. I need some lights that will reach from edge to edge (no shadows) and is programmable as well as led.I have a small colony of orange and green polyps, a small toadstool, a 2 small other soft corals. I want the lights to bring out the colors of my corals.