Short but thorough comparison.
For some reason Simon refused sending me both SFT90 and LHP73B, so I had to request he include the SFT90 mcpcb to swap in. Had to record everything twice, while trying to get everything synced for the video, bit of a nightmare to edit. His response was that both LEDs were very similar, however, they’re quite different.
Is Vpcell H50 a good choice for this light?
The H50 seems to be a rewrapped Tenpower 50XG, so yes, it’s an excellent cell.
Thanks, I was waiting for your review of the M21K. SFT-90 is a bit more throwy but its high Vf and nasty cool white tint can be a no-go for many people. If someone wants more throw I’d wait for the new round high power emitter from Convoy.
What are the expectations?
SBT90.2 alternative shrunk down to 7x7mm, 30A max current and available in different CCTs (3000K-6000K).
If the performance is there once it comes out both SBT90 and SFT90 will instantly become obsolete.
I really hope it performs well at 20A, I’d hate it to require the 30A to be comparable.
Sweet!
I love hearing about new emitters that might be better than the competition. 
It doesn’t have a massive LES or footprint, there’s no reason why it would be particularly efficient at the highest current. Also Simon said it can withstand 30A, maybe max current will be lower? I only hope it beats Luminus when it comes to brightness.
Just by some pixel measuring, the round die emitter will have closer to 12mm^2 of LES rather than the SFT90’s 9.6mm^2. So given the same current, it will almost surely perform better in output (due to lower power density), and for the same reason, worse in throw.
I’ll gladly trade a bit of range for a wider hotspot in 5000K though.
It looks to be a derivative of/from FFL909MX, technically larger LES (altough visually doesn’t look like it) but also better throw on highest mode:
https://www.reddit.com/r/flashlight/comments/1hyrprv/dethroning_the_sbt902/
Also even if it’s just going to match Luminus that’s great as it’s going to be a perfect blend of nice tint and good throw because as for now you have to choose either or. It will be a great option for smaller models like M21B or M21H where LHP73B is mostly flood (25 mm² of LES) and SFT-90 has a really nice balanced beam profile but it’s just nasty cool white (+high Vf so it runs hot). If the new emitter delivers it’s going to be the best of both worlds especially if they’re going to manage to squeeze more lumens as well (big if, hopefully).
