LED lights are factory sealed and designed for use below the water. Since these lights are fully submersible they are ideal for use in waterfall drops.
Illuminating areas in pools of water and even up-lighting aquatic plants are other ways to add impact.
Pond lighting makes it so relaxing to watch the fish glide through the water as if they are floating through the air.
Highlighting fish tunnels, jets of water, and even shallow water areas are equally amazing with light.