Made of high quality Marine Grade Stainless Steel 316 * Waterproof(IP68), Shake-proof, Energy-saving, Environment-friendly, with Marine Grade Wire * Designed for Surface Mount (safer than thru-hull) * Overtemperature automatic protection function. When environment temperature is more than 45 degree celsius or the voltage is above 30V, the output current of built-in constant current driver will be shutdown in order to protect the LED without damage, and when environment temperature and voltage is normal, the lamp also work normal. * Super-class high power LED which is encapsulated by high efficiency and latest heat disipation structure.