UV LED strip light troubles Answered
I rigged up a lighting display for some glow-in-the-dark memorabilia, using a 12V 5A power supply adapter (intended for LED strip rope lights) and some 5050 LED waterproof strips (trimmed down to 156 lights). I asked around and was told I didn't really need to add resistance so I just soldered them cleanly into the display and added an AC power switch between the plug and the power supply.
Everything looked fantastic for a few weeks, but over the last few days they seem to have faded... they are much closer to a mild, neutral white than the strong UV-only brightness they originally provided (fluorescent colors popped, GITD toys glowed nicely). There are a few places on the strips that have come to illuminate with a warmer, yellowy light. Before I purchase some new ones and prepare to replace these, is this a common issue with cheap light strings, or possibly something in the power supply I should check first? Do I need to add some resistance between the power supply and the lights?