Wish I could remember. I posted a similar question a couple of years ago. I was wanting to replace one that had a broken core. In my post I was wondering if having a piece of the core being broken off would have much effect on output. Was also asking where I might get a replacement. I ended up getting a replacement from Dat2Zip IRCC. I believe the original BadBoy circuit is very similar to the circuit found in the arc LS lights. Hope this helps.
cheers,
zwf