I just looked at Grants setup, that is very nice. Although I am looking for the lights to be positioned more towards the center of the trailer aligned with the bunks for driving the boat on the trailer. I think 6 on each side would be plenty for my application.
Grant, how bright are those red LEDs under water for loading the boat compared to white lights? If I install white runway lights and dont use an automatic switch, they are either going to have to be on all the time with the trailer lights or install a seperate toggle switch which might be a little bit of a hassle.