I have a project that is going to require in grade lights (requested by the owner). It is right on the beach literally. There is a rip rap dividing the owners yard from the sandy private beach. The caretaker has advised me that when there is a large storm (usually the remnants of a hurricane that makes it up the coast) the sea water has come over the stone rip rap and has blanketed the yard in about 2-4" of sea water. All the plantings are tolerant of sea salt and the fixtures need to be as well. That was made clear to me. Usually the water only remains for a few hrs at most because the soil is very sandy. I need an ingrade that is suitable for these conditions. My search has lead me to the Kim Minivault. I'd like to use it but will this fixture remain watertight when submerged for a few hours or should I go with a fixture that is rated for underwater use?