445nm 'handheld' design

Any ideas on a driver that would power this. I'm seeing about 14.4amps

put your diodes in series. Should be easier.

Okay then that makes it how many volts ideally? I am unsure what the magic voltage for m140s are. Somewhere between 4-4.5 I'd gues it'd be better to go lower than higher in case something bad happens. If 4 is good then 4*8=32volts. What will do that if that's right