Step 8: Cord and backing
Once everything was hooked up, it was time for the smoke test. I used an outlet strip with a circuit breaker which would shut off if there was a problem with the wiring, but luckily it worked fine.
Having verified that it works, it was time to unplug it and finish putting it together. I pressed the LEDs firmly into their holes, and closed up the back by gluing on the thin strip of wood I cut earlier on the table saw. Otherwise, tape or some other insulator would work to cover the back and ends.