I have no idea how the PCB got this effect.
Looks like the coating above the traces didn’t quite stand up to the heat over the years.
But it looks nice, maybe we can make PCB art with that.
That might be it. I was thinking it could the a spike in voltage that shorted the traces. But nothing else got damaged in the house, so it is less likely.
Hot climate? Looks like it was baked in the sun for a year or so.
Portugal. Not that hot in my town.
And the bulb was inside the house the entire time. I was using it for my desk.
Baked in it’s own heat?
I was gonna say the led bulbs I’ve had exposure to get extremely hot. Might have baked the paint
Traces seem ok, maybe wicking enough heat away?
The traces can probably sustain higher heat than that paint. Besides, the hottest part is generally the LEDs themselves.
