I would hate to have to run an Edge strobe bar with an external power supply. That would be one heck of a bundle of cables if you had more than 4 strobes in the bar....
There is 2 different bars both 8 strobes. The guy probably got it all in a "lot" & assumed they went together. He says the connectors would cut off so you would have to find some more to wire the bars to the power supplys.