Most of the variations are not visible, for example a change from 81 to 83 and then back down is not visible
down on the lower levels around 13 lumens, the swing is from about 12.4 to 13.1, that is not visible, its just a constant change on the light meter, within a narrow percentage, less than 5% mostly, which is not visible, and is an HDS target not to exceed
it IS a bit tricky when I post a number, and then upon recheck the number is different, the battery is different, but I cant see the difference between 25 lumens with one battery and 29 lumens with another battery
what I do see with my eyes is that 3.8x volt flicker that I find so peculiar, I had also reported it earlier on another light at 3.59v… there is some sort of mid voltage range flicker, that seems to have a narrow phase of action… sometimes it can be defeated by running high mode and drawing the battery down below that voltage by a few tenths
I dont really notice when my high mode goes from about 95 to about 85… its not visible to my naked eye, only to my meter
Since I started running the Storm on Primaries, using Battery Reset Detect for Primary:
I do see a visible flash once every 2 or 3 seconds, but it is not a consistent interval pattern. The Flashing happens when I turn on the lowest mode with a Primary at 2.98v, iow essentially full,
but I have not had any of the Flickers at 13 lumens like I was getting w LiIon @3.8v, since primaries dont reach that voltage… 
latest news
After discovering the Flashing, clearly visible with the naked eye, on lowest mode using Primaries, I have gone back to LiIon. They do not make the Low mode Flicker Visibly, and they hold steady regulation without flashing visibly on other modes, as long as the Voltage is above 3.84v or below 3.79v
Even though I am now using LiIon, I have left the Battery Detect enabled for Primaries, so I have the option to switch back and forth, without causing Low Voltage Warnings… I use Protected LiIon, so I dont expect any issues with overdischarging.