Comparism and teardown:
Size compared to other 18650 lights, I do not own SRK size lights, the MF-01 is a bit bigger than them as the head has a lager diameter than the battery tube
Beam color is neutral around 5000K for the Nichia 219C model, the Nichia has a nice uniform beam and color rendering is great
The LEDs are reflowed ok could be better and the MCPCB is perfectly flat, but not polished
Unfortunately on my sample there was a little solder under the LED board and the heat paste was not evenly spreadand some small dust particles on the domes of some LEDsfrom left to right the lights get warmer, picture taken
@5000K camera setting
left Astrolux S42 Nichia 219C 5000K, Astrolux MF-01 Nichia 5000K, XPL HD 1A 6500K
The LEDs in this light are available XP-G3 and Nichia 219C
The light can be taken apart completely, nothing is glued
The light has a massive tail cap with holes for a lanyard, and tail stands rock solid
The head has a diameter of 72mm and 62mm visible of the TIR optic
The battery carrier comes with a warning not to put in the batteries in reverse polarity