I emailed them repeatedly, and they finally replied to just simply refer me to their facebook site.
Yep, head diameter is 60 mm: https://www.acebeam.com/long-range-hunting-flashlight-19. Dunno how I missed this, or it was updated. I found a page on their site but didn't have the price or much details. Funny they avoid listing the full OSRAM part # - they list a "PM1", so could be either KW CSLPM1.TG or KW CULPM1.TG. Based on the lumens rating, it should be the Boost HX (KW CULPM1.TG).
422 kcd seems possible in a 60 mm light, but the 1650 lumens rating sounds aggressive.
The lumen rating is believable for thre boost HX if properly binned and driven. If you look at the head, you can see extra heatsinking. That tells me they’re driving the emitter pretty hard (all the Osram L lights do). Osram lists or up to 1900 lumens. I’m super excited about this one. I’ve been waiting for an optic light with a boost hx and am glad Acebeam was first.
PM is sent. Please check it.
Dunno about that. My dog was a lousy shot.
I’m not an avid hunter, but I am pretty sure here in Texas you can hunt hog at night. They are an invasive species so the easier to get rid of them, the better
Still no word on what type of LED being used in L19
The Olight Javelot Turbo has very similar specs. It is also using Boost HX and rated at 422,500cd/1300m but is using a reflector in a 63mm head rather than a TIR. I’d be very interested to see some side by side beamshots of these two.
It’s the Osram Boost HX (supposedly).
It’s overpriced.
Fireflylite T9R is basically same dimensions, throws farther, is cheaper, even with the SBT90.2 it throws as far as this one while producing 3x the lumens and still costs less.
True, a Noctigon K1 with W2.2 (4040 Boost HX, which is probably the same emitter as in the L19) is cheaper and performs better.
Isn’t the the head smaller though on the L19?
Vapor-Light T9R that doesn't exist yet, is 64 mm head, while the L19 is 60 mm.
No comparison with the K1 because the K1 has a much bigger 72 mm head diam, no tail power switch.
Also, the L19 is using a CC buck driver with no PWM. It's listed compatible with two RCR123's so has to buck down the voltage.
I'm defending the AceBeam L19 here, odd for me, but the differences between the supposed T9R and real K1 are significant and contribute to the higher cost of the L19. A buck driver that probably needs to produce 8-9 amps to get the #'s they are quoting is not cheap to do. They could be 'cheating' a little by having a direct FET output channel for turbo, I dunno, but still if you run it at lower levels, you get the benefits of a no-PWM efficient buck driver.
I have to agree here. I prefer a buck driver to an Fet, especially if well designed and regulated. I tested the L17 and L18 and really liked the output regulation. The L18 did very well and has a CC driver, no PWM,l with excllent regulation and performance. For it’s size (60mm) the L19 is a great light. Acebeam will undoubtedly issue a code for a discount soon as well so the high price will be easier to stomach.
The T9R looks pretty real to me. According to their website it’s in stock.
The T9R has a buck driver with >90% efficiency as well, only the SBT90.2 version has an additional FET-turbo. Also, the T9R has a built-in 2A USB-C charger, the L19 does not. The T9R has bypassed silver-plated BeCu springs and a stainless steel bezel. The “aggressive strike bezel” of the L19 looks like anodized aluminum to me. They’re making a mystery out of the “advanced” LED they’re using instead of just specifying it, no matter which white flat Osram it is, it’s not that expensive.
Remember, it’s all opinions.
The L19 looks like a nice light, I wouldn’t buy it at this price point. Reasons.
I checked the FF web page, not listed under flashlights but see it now under New/Pre Orders.
6 amps CC makes sense for the Boost HL, but doesn't make sense for the Boost HX considering the claimed lumens and throw. The HX wants about 9 amps for it's best output.
The 65 mm head diameter is enough to put it up a bracket from the 60 mm head L19. Also the IP66 rated T9R means no immersion in water, while the L19 is IP68 rated for 5 meters.
For the T9R, I'd go with the Boost HL rated at 600 kcd good performance for it's size. I have the SBT90.2 K1, and with only minor mods, it makes over 500 kcd, and the green W1 K1 I have is doing 730 kcd.
Again, if the compact size, dual switch, available pressure switch, and better water resistance are important, the L19 is a better choice.
6A CC does make sense for the Boost HX. They’re not claiming best output of the HX, they’re claiming 1500 lm. Acebeam is claiming 1650 lm. Not much between the two and those are just claims by now. I think Acebeam is just a bit more optimistic with their numbers.
Here’s a test of the HX that EasyB did a couple of months ago.
So at 6 A the HX could deliver that output. I see very little gain from driving it at 8 A or even 9 A. I don’t think Acebeam are driving that emitter at 9 A either. Even 8 A would be a lot for a manufacturer. I’m not a fan of driving LED’s at their peak in the lm/A graph, because of variances between one LED to another of the same type, lifetime, very little gain, etc. From that point of view I think 6 A to the HL is a bit much in the T9R.
For me, the differences in head diameter are very little, but of course every mm matters when it comes to throw range. Just don’t make the T9R 66 mm in your next post. 
I hate to disagree with you Tom, I respect you a lot, BLF legend. 
I barely hit 1500 lumens at 7.6 amps on a HX bought recently from Simon. Dunno, maybe it's a low bin comparatively. At 9.25 amps it did 1630 lumens. Didn't record #'s lower than 7.6 amps, but it ramped up consistently between 7.6 amps and 9.25 amps. At 10 amps, it was reading lower.
That EasyB test is not the HX, it's the older W2 - post is 2 years old.