SHADOW-CASTER® underwater lights are designed to live under the water. Anyone that owns a boat, especially boats that live full time in saltwater, understand what a harsh environment this is. Combine corrosion with the fact that barnacles quickly grow on anything left in the water, and it is easy to appreciate the challenges involved with designing products to live in this environment.
We recommend that lights be cleaned regularly to provide the optimum performance. When lights are cleaned by simple brushing the marine growth will be minimal. In the event that staining occurs, we recommend Naval Jelly which is commonly available at your local hardware store. Simply follow the manufactures’ recommendation. This typically just involves applying it to affected areas and rinsing it off.