I want to brighten things up a bit for the tow rig.  Trying to think of ideas for adding some extra backup lights for these dark ramps in the morning.   Probably going to put them on a switch and mount them on the back of the truck.

What about something like this ~ 

https://www.etrailer.com/Trailer-Lights/Optronics/BUL111CFPG.html

 

A-Jay

Have you already gone to led bulbs?  In my truck I put these in the cargo light on the top of the cab and also in the reverse bulbs.  Big difference in light output. 
 

https://www.amazon.com/gp/product/B01H57FXWA/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Good ideas.  I was thinking if I had something on a switch I could use it for loading up in the morning or working on something in the dark.

My replacement led trailer light assemblies have backup lights built into the unit, just connect an extra wire for the backup light part......if you don't have a set of led lights....get some, they are awesome, far brighter with less amp draw....and they come with builtin backup lights !!

When it's an option ~ LED is the way to go IMO.

A-Jay

I use a pair of the same 6-light LED A-Jay posted but mine have a mounting bracket and are mounted under each side of my back bumper. 

On the 24' pontoon boat, I mounted a couple on the back of its trailer and use the reverse wire for that locks out the brakes to backup to power them.  That requires using a five-wire plug made for that.  It gets used a lot by my granddaughter and her husband for night fishing and where the ramp is, there's pretty sorry light. 

I will say, I did have one of our locals finest try to give me a hard time backing out of a parking spot at the mall one night, trying to say they were too bright and blinding.  I was polite with him and agreed to try adjusting them down some, while thinking the whole time "what an AH" and left them just like I had them.

Not sure what you're putting them on, but one of these might work for your setup.
https://www.amazon.com/Dasen-Universal-Receiver-Bracket-Off-Road/dp/B07PTPCRC2/ref=asc_df_B07PTPCRC2/?tag=hyprod-20&linkCode=df0&hvadid=343269704531&hvpos=&hvnetw=g&hvrand=4468402798437232224&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9019155&hvtargid=pla-738796843658&psc=1&tag=&ref=&adgrpid=69167827335&hvpone=&hvptwo=&hvadid=343269704531&hvpos=&hvnetw=g&hvrand=4468402798437232224&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9019155&hvtargid=pla-738796843658

Otherwise, replace your normal backup lights with a good set of LED's. Like other said, the light output is a huge upgrade! You can also add ones like AJ posted to the trailer. I did on my old boat and it was a huge help. 

Wish I could remember how I did it. I mounted LED's to my trailer that would come on when in reverse. I don't own the boat anymore. 

Honestly, I have tried some and all it accomplished was allowing me to see my boat.  I don’t load after dark so no help on the ramp. My led backups are bright enough to get the job done and to put out enough light for my backup camera. 

Disregard