Thanks for input, everyone! I see that we are comparing with the MS03 other single 21700 multiple emitter lights with 7,000 to 11,000 lumens.
I got nine different model flashlights, 15 lights, in less than two years, in my attempt to get the best single 21700, multiple emitter, 9,000 lumen light.
23. Nitecore TM9Kvn, 21700, 9 x stock XP-L2 6500, Jan. 6, 2020, 9,500/268 meter factory specs, Vinh measured specs after boost: 9120 lumens, 297 meters
24. Nightwatch NSX53vn Jan 27, 2020. 21700, 3 x XHP 50.2 8,000 lumen, 375 m.
29, 30 and 31: Three Lumintop FW21a Pro Vn, May 26, 2020, single 21700, triple XHP50.2. 9,500 lumens, ~350 m.
32. and 33: Two Imalent MS03vn, June 15, 2020. Single 21700. Triple XHP70.2. 9,535 lumens, 313 m.
34. Mateminco MT07 vn 7 x W2. June 16, 2020. 8,000 L, 678 m. Single 21700/26650.
35. Astrolux (Mateminco?/Sofirn?) EC03 July 9, 2020. 21700 3 x 2XHP50.2, 6700 lumens, 303 m. In my eyes, factory specs appear to be under reported.
38. and 39: Two more Astrolux(Mateminco?/Sofirn?) EC03, August 4, 2020. Lumens appear to be more than factory speced.
46. Another Nitewatch NSX53 vn, Dec. 24, 2020. 9,300 lumens, 444 m. This sample is boosted hotter than my first sample.
48. Astrolux (Mateminco) FT02S Dec. 28, 2020. Single 26650/21700/18650. 4 x XHP50.2 from a single cell. 11,000 lumens, 546 m.
49. Lumintop FW21aPro Vn 3 x SBT 90.2, March 2, 2021. de lens, 8,500 lumens, 486 m.
51. Mateminco MT70 Mini single SFN55.2 single 18650/21700/26650 Oct. 1, 2021. 6,800 lumens, 1,428 m.
I like all of them a lot, I have kept all of them, except for two FW21a Pro vn that I bought to make gifts of.
All of them function properly. There is no "Best". There is no "Worst". All of them have attractive plus points.