Underwater and landscape lighting for ponds, waterfalls, fountains and spillways. Choose warm white for a natural look or color-changing fixtures you can program from your phone, then pick a transformer sized to the total wattage of the lights on that run.

Most low-voltage pond lights connect to a transformer with a photocell or timer so the lights come on at dusk. Plan cable runs before you set rock, and leave a service loop so fixtures can be lifted out for cleaning. Questions on sizing? Call Mystic Koi & Water Gardens in Upland, CA at (909) 920-3767 and talk to people who build and keep ponds every day.