@Hardusvd70
You use 3 different luxmeters for your readings comparing different flashlights, could you please reduce that to just one to get a fair comparison? (not saying your readings are wrong, just less accurate like this)
The MF04 should be about 2.7A at the emitter on the later versions. Cree xhp35-HI has a plus or minus 7% variation on each bin so no two lights will measure they same. Plus the lumen tube has a plus or minus 5% variation. So 1930 lumen sounds about right to me.
Astrolux is probably not using a top bin emitter due to costs. They also probably don’t use a bottom bin, more likely they use something in the middle.
I guess you would have to measure the lumens, then swap in a top bin emitter and see if you get gains. If it’s 10% to 15% gain then maybe the original is one bin level lower, etc… It’s all very hard say for sure. Whether it’s 1930 or 2130, you probably can’t see the difference with your eyes. Only the equipment will see it.
Regarding MF04 questions from my fellow members, I will reply them once i finish clearing some of my personal works soon. Sorry for the late replies in advance.