MY LED LIGHTS WON'T TURN ON!

Ugh, I am having a real head-scratcher here. My LED lights just refuse/decided/failed to activate. I've checked/looked at/verified the outlet/switch/power source, and it seems to be working. Could there be a faulty connection somewhere? Any ideas/suggestions/help would be greatly appreciated! I'm at my rope's end. Troubleshooting Faulty LED Lights

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