Just passing on some lessons learned: My homemade lighting rig includes (like many) the 12v veleman xenon strobe in the rear. As an experiment, I purchase two strobes and hooked them up in parallel. After a few days, one of them failed. I sent it back to allelectronics for a replacement, which also soon failed. Allelectronics wouldn't refund me for the second one - said that I had "overvoltaged" it (which I thought was unlikely, seeing as how I had connected it to a 12V battery). Anyway, I'm pretty sure the failure had to do with the fact that they were connected together - I'm guessing that the charge/discharge cycle of the circuitry in the strobe causes a momentary voltage spike on the supply wiring. In other words, one strobe burns out the other.

Anyway, if you're going to install two of these, you probably should investigate some sort of electrical isolation (maybe some diodes or capacitive filter).

Russ