I decided to install the back-up lights along with all new LED trailer lights. The first time I used them in the dark was a jaw dropping event. I should have installed them years ago. I installed 2 USA made LED strip lights. 11 bulbs in each strip. I paid $25.00 for the two of them.
The second photo shows how well the truck back-up lights illuminate the trailer. They do not interfere with being able to see the area behind the trailer.
Third photo shows the field of vision the trailer back-up lights provide.
Those little photos don't a give decent image of how they actually look.