... hours.4), Built-in or external constant current driver.5), Overtemperature automatic protection function. When environment ... built-in constant current driver will be shutdown in order to protect the LED without damage, and ... (IP68), Shake-proof, Energy-saving, Environment-friendly. 8), Easy to installation.Parameters and other details:1), ... . Ultra bright,9W high power,12V DC,waterproof,led marine bulb