Feature weatherproof construction suitable for interior or exterior installations a shallow-depth profile (less than ½" below mounting surface) and easy to install mounting. Ideal for salons and staterooms as well as helm stations flybridges and hard tops. The lights are fully sealed and IP67 compliant. Intelligent circuitry enables advanced features like dimming and four-color control without external control modules or specialized switches so you can use any existing "on-off" switches and eliminates the need for multiple wire runs necessary for other multi-colored lights. 1.99" Diameter.