NARVA Designed from the ground up, the multivolt Model 37 trailer lamp has been engineered for use on boat trailers where regular submersion is common. The lamps are protected from water ingress with a two stage sealing system that incorporates ultrasonic welding and a two-part epoxy glue. This allows the lamps to comply with the stringent IP68 standard. Each lamp is fitted with a waterproof connector and joins effortlessly to the main harness which is also compliant to the IP68 standard.