Still not sure if i want to deal with this as a product… but maybe some day soon.
The blue LED has enough energy to charge the glow powder resin encapsulated inside (but not the green)…
but you can charge both with the LED on your phone just fine…
the down side - the green LED is bright but other colors of this particular PCB design are not that great… blue is about half as bright as green, and red is basically imperceptible… anyone find some better examples on alibaba I’d go ahead and get some to test.