Commonly referred to as “wet location” fixtures, LED Vapor Tight Fixtures are sealed and gasketed luminaires that provide general illumination for indoor and outdoor environments where exposure to water, humidity, and dust is likely to occur. These luminaires are usually mounted on ceilings, soffits, walls, or in any other commercial and industrial building or facility where exposure to water or dust (or other elements) is a concern.
https://www.sanitylite.com/vapor-tight/