Filming 1080p 60fps has a shutter duration of 1/120 th of a second (ideally) so over 80 pulses to average if PWM is 10khz. That rate should be more than fine for even higher speed stuff.
19khz sounds ideal to me.
I can solder and do some machining, upload Arduino sketches etc.
I bought 3 of the supfire l3-f2 Mini Review: SupFire F3-L2 Zoomable and have http://www.gearbest.com/headlights/pp_299060.html
While it would be awesome to be able to use these lights, I’m also looking to make a larger custom cob solution as well.