10 pcs TMH 3.6 Inch submersible 4 LED Red & Amber Side Led Marker (5 5) 10-30v DC, Truck Trailer marker lights, Marker light amber, Rear side marker light, Boat Cab RV

CLEAR LIGHTS: I bought 10 of these to place underneath my pontoon boat deck to light up the water at night, and also to replace a brake light on my boat trailer. I installed 8 of them. They were used extensively on July 4th and I was impressed by the results. They are very bright. In the shallows of the Gulf where the water is clear, just 2 of them brightly light up the sand to at least a depth of about 3-4 feet.The clear casing material is hard, but not a brittle plastic. It seems to be a poured urethane. These are poured as one-piece, and seem 100% waterproof. However, I am weary of the area where the wires enter the casing, so I utilized large globs of clear 100% silicone caulking in the wiring area. They now seem to be as waterproof as anything could be. I also installed 2 of them as running-lights, which will get full sunlight, so only time will tell how bad they yellow or haze.I did not use the chrome-plastic covers, but they just snap on. The wires protrude from the back, so you can only flush mount if you drill center 1/4″ wiring holes. Note that the lights themselves are small, about the width of a man’s palm.UPDATE on CLEAR LIGHTS: A few LEDs in a few lights have failed. None failed completely, so this is acceptable to me considering the low price, and the fact that a boat in salt water is not the most friendly environment.REVIEW ON MY SECOND ORDER (RED/AMBER): Bought these to replace the taillights on my boat trailer. Each side uses 2 lights. Again, I used a large glob of silicone adhesive where the wires go into the light to keep the water out long-term. These have been completely under salt water twice at the boat ramp and are still working. This will be a major test of these lights since the trailer vibrates quite a bit on the road, and then the lights get submerged. We’ll see how long they last, but so far, so good.