Not sure if they can be submerged but I use them on a general purpose motorcycle/trailer and they seem waterproof enough for that purpose. I don't think I would trust them with my boat trailer. They're not the best of the line and I'm not sure how long they will last, but for the price they seem decent.
Wellmax Trailer Utility Assembly Attachable
7 Review
Tires Sailun Ice Blazer WST3 215/50 R17 95T spike
9 Review
π¦ Bully CR-017F Oval Blue LED Hitch Brake Light: The Ultimate Braking Solution
9 Review
Enhanced Linkitom Submersible LED Trailer Light: Ultra-Bright Brake Stop Turn Tail License Lights for Camper Truck RV Boat Snowmobile Under 80" Inch
9 Review
π¦ High-Performance LED License Plate Trailer Light: Bracket Mount, DOT FMVSS 108 Compliant, SAE L Certified, Gray-Finish, Waterproof, 12V DC - Ideal for UTV, ATV, Trailer, Truck, RV, and Boat
5 Review
π Waterproof Warranty Grommets by Nilight TL 01
6 Review
Trailer License Plate Light (LED) - Bracket Mount, DOT FMVSS 108 & SAE L Compliant, Black-Finish, Waterproof, 12V DC - Ideal for UTV, ATV, Truck, RV, Boat, and More
3 Review
AmeriLite Replacement Silverado 2003 2006 Harness
3 Review