This LED trailer light kit is completely safe for water-bound trailer applications. They contain a reflector surrounded by 12 highly visible LED's. On their underside, there are four white (clear) LED's for illuminating a license plate if needed. The RecStuff line of trailer LED Trailer Lights are easy to install. LED trailer lights respond instantly and are visible from a further distance than the traditional incandescent bulb providing a safer ride for you and the vehicle behind you. LED lights consume 10 times less power, provide longer life, and provide optimal visibility. The LED trailer light is a spectacular upgrade to perform with minimal cost.