The Portable 12v LED System is meant to be used TEMPORARILY. You are welcome to use the system anywhere there is water, but it must be taken our after each use.
If you were to use the LED system at your dock and leave it in the water for an extended period of time, aquatic growth would accumulate on the light, which would eventually break the system. LEDs, in general, do not product any type of heat to inhibit aquatic growth. That is why we do not use LED lights for our dock systems. We only use HID bulbs for our dock systems.
If you are looking for a light to keep at your dock indefinitely, your only option is to go with the HID Underwater Fish Light Dock Systems!