... , 9W, 18W, 27W, 36W etc 5,Constant current driver 2012 Wholsale High power 6x3W LED Navigation lamp Features: 1), Super-clase high ... 50,000 hours.4), Built-in or external constant current driver.5), Overtemperature automatic protection function. When environment temperature is more ... above 30V, the output current of built-in constant current driver will be shutdown in order to protect the LED without ...