[quote=sbslider]
I was using an alkileak, but it had not leaked.[/QUOTE]

uuum, DeNial is not a river in Egypt
Thanks for tolerating my sense of humor

I would argue that the alkileak had in fact vented inside your light, possibly in the form of hot chemical laden gasses, that condensed on the cooler end, furthest from the LED
to wit
you found the residue on the spring :slight_smile:

I just love being right, dont you?

one more, from my younger daze