Presently I'm a newb to optical triggering, having mostly relied on Phottix Odin, or in the past Canon's ST E2. For some reason I was under the impression that my Canon 430EX ii could also fire by sensing light, but either am mistaken or haven't figured it out. I don't find the manual completely helpful for my way of understanding.
Some months ago, I watched a video where a guy set off an array of about 1 dozen speedlites for effect, apparently using light to trigger. It looked like something I would like to start experimenting with, provided it can be done without buying more wireless receivers.
What affordable brands of speedlites can fire as a slave acquiring just pulse of light?
I also have two Flashpoint 360s but haven't dug into the manuals on those lights yet.