So it seems that some people are having issues with various cells dropping down the brightness to a lower level after a second or so of Turbo S use. JohnnyMac did a great review of the Olight X7 and experienced the issue with the Olight cells designed specifically for the X7 (see his Conclusion section - link below) and other people have reported some problems with other cells also. I also experienced the problem and thought it was just my cells - but apparently not. Btw - I also have the Samsung 30Q’s and never experience any problem with those cells.
JohnnyMac’s review: