Im happy to say the low mode PWM does not flicker visibly, to my eye. Although the Opple ranks the Flicker Index as High Risk on the two lowest modes:
those two outputs are from my own lumen meter and they match the official specs almost exactly (spec level 1 is 0.03 lm, and level 2 is 0.11 lm)…
Even waving the light on level 1 does not produce discrete dots:
visible flicker was expected based on other peoples reports… but I dont see it on this one, so I think I won the lottery… lol
also pleased the Tint DUV is not above the BBL… looking forward to night time 
outputs on my meter, and my G6 program:
I prefer the SC64c LE driver, it keeps the LED at more Constant Lux, uses a lower Modulation Depth, higher frequency, and lower Flicker Index score, than the SC65:
On Level 1, the SC65c is using slow PWM, at 253Hz, and the Minimum Lux is cycling all the way Off.
here is Opple 3 Flicker Index tests for all 12 levels:
(lumens from my meter read high due to the small LED w intense hotspot)
