Hi, got your pm asking for advice on this. I also forwarded it to AlanB since he knows what settings he used.
First I had to find your order in AlanB's sales thread to see what you specified.
Next I refreshed my memory on the
Osram 64633 bulb from my tests.
You told AlanB that you were using 5 x IMR26500 (AW's Lithium Manganese cells) which fully charged, should provide 21.5+V.
You specified a regulation maximum setting of 16.5V, which should be well within the safe range, and you specified a nice, safe soft-startup time delay of 500ms (half a sec).
Based on just those two parameters, this bulb should not be blowing, and I suspect it was not setup/calibrated correctly.
The good news is it appears that you ordered a programmer with your order. The bad news is you may need to now learn how to use it...or send it back to AlanB. I believe the latest version of Alan's config files are
in the phdConfig-R0020.zip file at this download link.
I have looked at Alan's graphical Python setup program, and there is an entry for the 64633 bulb, but let's let him see your post and my initial comments before we go any further. Even the graphical python program he wrote may be too detailed for someone just starting out.
I know you can start by taking the various voltage readings with the batteries outside the light (just touch them end to end, and measure that battery voltage), then like you did before, put the probes in the empty bulb socket, and see what your readings are with the various click combinations you specified in your order...but a double click going to maximum voltage should be the most important reading with regards to the bulb flashing issue.