... High luminous efficiency, life-span reachs 50,000 hours. 4), Built-in or external constant current driver. 5), Overtemperature ... and voltage is normal, the lamp also work normal. 6), Professional waterproof design and prevent seawater wires. 7), ... colors: Red, green, blue, yellow, white 27W led underwater boat light waterprotection IP68 with 316 stainless steel ,Semileds led chip ,use for led ...