I’ve used a Hiuon dimmable A3 and A2 LED tracing panel for years to take Flats with my 8” and 10” carbon Newts
Back then they were only $65 now $120 but still very cheap compared to retail Astro flats panels like Pegasus and similar which are $250 to $350
https://www.dicksmith.com.au/da/buy/...6930444800079/
I did add a layer of 3.5mm opal acrylic diffuser ( Bunnings ) to dim it slightly for some filters ( I can’t remember which ones ). Taped with cloth tape around outside edge of panel. Took half an hour.
I also cut a piece of thin black cardboard ( office works ) with a hole to match size of OTA and taped it to flat panel to eliminate excess glare around focuser and scope. Took 10 mins to do.
Have no issues at all with my ZWO 2600MC with Dualband and ZWO 2600M and Antlia LRGB and 3nm SHO filters
Just slew the scope vertical , turn tracking off and take them. The dimming control works well and after using it for a while you know roughly where the illumination settings should be for each filter ( they don’t need to be exactly the same each time ) The only adjustment after that is the ADU target range.I can have all my flats done in under an hour. I usually take them on a cloudy night when not imaging to maximise imaging time. I don’t reuse flats , I take new flats for each project.
I use Flat Aid in APT
Cheers
Martin