The Wake Flame underwater light from Rigid Industries LED Lighting is designed to be installed on watercraft below the waterline. The SL Series features a 4” round billet aluminum housing and the SLX Series features a 6.2” x 4.7” oval housing and both utilizes a Triplex™ coating process that is up to 5 times stronger than MIL-A-8625 (Military spec for anodic coatings). This process safely allows for the use of aluminum in salt water environments. All Wake Flame underwater lights function as a master, slave, or stand alone light system. The Wake Flame works with or without DMX controllers as well as with multiple lights. Limited Lifetime Warranty.