This is one of the best things I have done to my trailer.

On my 19 foot trailer I never had much trouble with backing up but with my newer 28 foot trailer you just cannot see in the dark that far back anymore.

I all started when clipped a tire on a short piece of wood that the forest service uses for a barrier on their sites because it was so dark I didn't see it and ruined the tire, but it did still hold air.

I purchased 10 lights on eBay for a killer price. (Or search for 2x 18W Cree LED Work Light Bar Flood Beam 4WD Offroad Vehicle Driving Lamp) Now I find they are 1/3 the price now.

I use the reverse light wire from the trailer plug to energize a relay and I let the trailer power the lights mounted on the trailer.

I also on the right side center light over my tires so that when I am turning right it turns on using another relay, diode and a capacitor to keep it on for 4 seconds so it doesn't flash so I can see the curb.

I also have a switch on the trailer I can turn them on with and one of my up-fitter switches inside my truck to be able to check out my tires while driving.
I mounted two of them under my truck bumper, two over the tires and two on the back of the trailer with them facing outwards a bit. I also found the wire to my back deck lights and have them turn on also. I put led's in them to be much brighter than the little bulbs that come in them.







Found a small program called TinyCad and I was able to create a wiring diagram.

 

Very nice job!!!! I will be looking into this!

 

Very nice. I like the tire light when driving.
I'd hate to be that guy tailgating you when that up fitter switch gets flipped up!

 

Think that'll tell that guy to turn his brights off?

 

No, it is only used when no one is around.

 

They have a good price on these lights right now.