MIU Round Underwater Series Size 10 (18W) - Royal BlueOur first round light, The new MIU R10 packs all the features, construction methods, and technology of our popular MIU Series in a familiar and friendly size and shape format!3.5 inches round, with a thickness of only 0.300 inches (89mm round by 7.6mm thick), the R10 is simple to install, extremely robust, and most of all bright at 18W total power. Proprietary Macris Industries manufactured chip-on-board light engine with multi-volt input (10-30VDC), Active Thermal Monitoring, SoftStart, Polycarbonate housing, and Composite Laminate Technology (CLT).