The majority of L.E.D lamps are termed sealed and would seem appropriate for applications such asboat trailers. Sealing the lamp however is not enough to ensure a lamp is submersible, as water canstill enter the lamp via the connecting cables or via a pin hole in the sealing process as a resultof capillary action.
100% tested after the sealing process. It is recommended to avoid joining the cables near the lamp or in a position where they are in contact with water.
To overcome this problem the Model 36 lamps are available as a kit and supplied with 9 metres of hardwired fully insulated 4 core cable.
This allows the cable connection to be at the trailer plug, an area not submerged while boats enter and exit the water.