19. Submerged “Bubbly” LED Bubblers
If your pool has a bubbler feature (a fountain that shoots water from the floor), placing a light inside the bubbler nozzle creates a sparkling, illuminated column of water.
How to make it: This requires installing a specific lighting ring around the plumbing of the water feature.
Ingredients needed: LED light ring compatible with pool plumbing/nozzles, specialized waterproof wiring.