You do not have mandatory

For LED strips, it is advisable to keep these in aluminum rails. In parallel, they are "holders" offered.
Priced not a bargain, rather the opposite!
Adjust and keep well, even if only very limited. The sheet is too thin and the aluminum frame jumps eingeklipüste ultimately out sporadically.
Anger pur!
Use the strips to drill and fix it with a small screw from the hardware store or with a good tape doppelsetigies force the requirements are met as well.
Consider that the LED strip is placed only in an aluminum housing for the heat. It would also ensure a cheap aluminum rail from the hardware store in open way of laying.