"JR North" wrote in message
...
I know all diodes actually emit photons, but this tiny glass Zener is the
first one Iv'e seen actually glowing LED red. Is it bad?
JR


I've seen diodes for voltage regulation which look like small signal glass
types, but actually glow red. Unless this diode is passing a large amount of
current, I suspect it's meant to light up. Does it get burning hot? If so,
then there's probably something wrong!

Dave