Neal, do you see any chance to ask Jackie (Enogear) if he can raise the thermal stepdown threshold up? 50°C is way too conservative in my opinion. Surely, the light will not get too hot to hold but you sacrifice a lot of turbo runtime with such a low stepdown temperature. Thank you!
Enogear?
which light is it
Ooops...sorry, I was certain that NIGHTWATCH is a brand sold or at least manufactured by ENOGEAR, see NIGHTWATCH IRA with XHP70.2 for reference.
http://kaidomain.com/Nightwatch-IRA-Cree-XHP70_2-White-6500K-3800-Lumens-6-Mode-LED-Flashlight-Black
https://budgetlightforum.com/t/-/48891
That's why I was thinking you could ask Jackie (the owner of ENOGEAR and FIREFLIES). May I ask what manufacturer is behind the NIGHTWATCH NI40?
I would be highly interested into the NI40 but as I said it sacrifices a lot of turbo runtime due to the low thermal stepdown threshold of only 50°C.
Looks like slice n’ dice!
Awesome to see a manufacturer doing this!
AND this is not even a $100 light!
Is the 50.2 a 3 volt led ?, and what type of driver Fet + AMC ?
Looks like host has been added with driver.
Curious about runtimes before step down. Was planning on getting a Catapult V6 but I’ll wait for this.
When will reviewers get theirs?
hmm i prefer no driver and led.
dont like stock driver 
Are you sure? I have a LD-A4 driver in a Convoy C8+. The LD-A4 has onboard temp threshold that turns off the driver at 65 degrees Celcius. At that point, the host is impossible to hold except at the tail. I then went and wired in the temp sensor on the MCPCB to the driver and set it to trip at 55 degrees Celcius surface temp of the head, measured on the fins with an infrared thermometer more or less in line with the shelf. The LD-A4 driver is at that point still far from exceeding it’s own onboard threshhold of 65 degrees celcius.
Maybe 55 to 60 degrees celcius driver temp would be fine, but in my opinion 65 to 70 degrees Celcius driver temp is pushing it…
Jack used to sell the dual switch version of the Nightwatch IRA with the copper pill on his Enogear site and that was a beast of a host. I put in a 4x E21A in that host and it can pretty much sustain turbo indefinitely in outdoor use while holding it in the hands.
One might have to buy both the SST40 NW dedomed and the sliced and diced XHP50.2 versions just because of the leds. 
Signed up for SST40 NW in M4D M4X interest list.
Neal, do you think it may be possible to get a dedomed XHP50.2 seperately, without the flashlight?
Not my photos, but shots taken from this light, though it’s unknown what type of led used:
Mine is still to be sent.
Would love to get an MCPCB of the dedomed SST40 NW…
The Nightwatch NI40 Stalker beside its brethren:
For an even lower group buy price, you may post your interest in this thread:
are they going to revise the driver mode spacing?
i like this light but dislike the driver . 
The driver is different depending on which emitter you choose. There are 8 7135 chips on the spring side of the 50.2 (yes, a 3V XHP-50.2) but there is nothing on the spring side of the SST-40 driver and it is green, completely different driver. The UI is High to Low on the 50.2 I got, and Low to High on the SST-40.
I tested with a rested Basen at 4.12V and saw 3.26A to the SST-40, while the same cell showed 9A (after climbing for a bit) to the 50.2.
I don’t have lumens numbers or lux numbers at this time, was working outside all day in the heat and am beat, but I did get the old Arctic Cat running! 
I just took a tint measurement on my SST-40 version of the NI40 and got these results:
CCT: 4780K
DUV: 0.0250
Ra (CRI): 66.6.
With a DUV of 0.0250, this is by far the greenest tint I’ve ever seen in a flashlight. It’s unfortunate because I really like everything else about the light. It is very solid and well built (typical Nightwatch) and the functional cooling fins are done perfectly. The dedomed SST-40 throws really well but the tint is unfortunate. This does make for a really good host for modding. Maybe if you put a 1mm or 2mm White Flat in there, the thermal performance of this host might be able to handle max output until the batteries run out.
Chemical de-domes tend to push an emitter into the green, and they definitely chemically de-domed the SST-40, with what is the mystery as I have known several people trying all sorts of combinations to get the 40 to come clean! They’ve done it here, and it has a nice tight beam… outdoors where green is prevalent it really isn’t noticeable and of course if throw is really what one is looking for the slight off-tint half a mile away is usually much less a factor than the subject illuminated… 
Sharp fins are my pet peeve. I have baby soft hands.
Surprised even with the dedome the tint made it down to 4780K. They must have de-domed one of the neutral bins. The cool whites I have sliced previously were still very high CCT before and after slicing.