Originally Posted by
rumrunn6
just got some red tape at Walmart for my hitch mounted cargo carrier. haven't really tested it much, but it seemed to reflect the flash from my camera. it stuck on pretty well & easily. the cargo carrier is stored in the basement, so it was cold & dusty. I cleaned it & then warmed the areas for the tape w a hairdryer. it's pretty thin & I'm sure it would wrap around bike frame tubes

I think this setup is unsafe. Better use high-vis boxes in yellow or orange, with large reflective stickers on all sides and corners, high and low. On the rear that may have to be be reflective red, and on the sides reflective orange, if the legislation in your country requires so.
And I would use more cordage, that is at least twice as thick. The cord should be clean and without signs of wear. And it should have well selected professional knots.