Strobe flash duration doesn't work lower than 29.
Personally I'd stop at 50 if your combo boxes jumps values in blocks of 50, or at least a multiple of 10

It's a little annoying to get to 1 via the minus button and then the plus is 51, 101 etc

Maybe a nicely worded "you can blind people or cause fits" discliamer dialog box would be a good idea? Only on first use or so you don't have to accept each time?

Also I'd say Lanterne is becoming a "Camera LED Flash Tool" more than a "Experimenter".