Thanks for the quick response and detail information. I am a flashlight fan myself. I wonder if you notice a particular behavior of Olight M2X related to the brightness change.


There are two ways to adjust the mode and/or brightness. One way is to turn the head back and forth. Another way is to click the tail cap:
  • One click to access the brightness you set. Factory pre-set is low.
  • Two quick clicks to access the highest mode
  • Three quick clicks to access the strobe function.

If you enter the high or strobe mode through double / triple clicks, brightness adjustment function is disabled by design as the double and triple click modes are preset and cannot be changed by user. So when you mentioned that the flashlight cannot change brightness, could it be because the light was on the high or strobe mode through double or triple clicks?


Let me know if this information helps resolve your issue.