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What is the difference between a waterproof and submersible light?
Submersible lights use the bell-jar concept. This allows a small amount of water inside the housing. The resulting air pressure inside the cavity prevents any additional water from reaching the area where the contacts and sockets are located. Waterproof is usually associated with a completely sealed light. Competitors often claim their light is waterproof, but in actuality, their light also uses the bell-jar concept.
How do I choose trailer lights for my personal watercraft and boat trailers which meet DOT standards?
You would measure across the widest width of the trailer. If the measurement is 80” or above, you must purchase a light kit that is approved for over 80” trailers. If the trailer measures less than 80”, you can use any other light kit which is available.
Do you have any tips for launching your boat when using non-submersible tail lights?
Be sure to unplug wire harness and let lights cool down. Use lithium grease in the socket to reduce the corrosion that water can cause.