These UV LEDs degrade quite quickly at 3v 20mA. After 1 week most of the LEDs start shifting in color and about half of them vastly decrease in brightness after 1 month. Running these LEDs at 8mA decreases the brightness significantly but prevents them from degrading. Fortunately my application requires a large array of dim LEDs anyways so the reduced brightness is not a concern. Would only recommend if you are okay with running them at less than 10mA with reduced brightness.
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