I've only just taken my first batch of flats with the STL-11000M using one of Pete's lightboxes cranked at 50% power.
My 1x1 luminance flat lights were exposing around 20,000 ADU at 0.4 seconds. 2x2 were 0.2 seconds.
I'm processing my very first image at the moment and it looks the goods. I think I hit the jackpot first time around. : )
H
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