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
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".