Short answer: Hot glue!
Yes – hot glue holds up very well. If you need to relocate the RGB strip lights later on, you can just peel off the glue easily. We do not sell hot glue guns on this website, however, you can purchase one at your local hardware store.
The 3M adhesive strip, while pretty strong, may not be as effective if you constantly need to move the lights. It may work 2 – 3 times at most since it’s just 3M.