I think it's a reasonably compact 21700 flashlight.
If that's too big, and maybe it is, then stick to compact 18650 flashlights. 
… and a blatant affiliate link to Acebeam 
Can you put it up against a wall and measure the angle please?
I'm not going to do that, but maybe someone else will. 
FET drivers have high initial output, heat and battery drain. Brightness drops steadily as the battery drains. Regulated lights put out a constant brightness until the battery voltage drops to about 3.7 volts on high and then usually steps down to a constant medium level until about 2.8 or 3 volts.
Most regulated lights will still have thermal regulation though, so only put out a constant brightness after thermal regulation has balanced.
This is a nice light. It’s like 20x better than a convoy. Worth the money IMHO.
I think I’ll get one. Similar performance to the Convoy M21C/D, more compact, and looks amazing.
It’s a boost driver. 6V for XHP70.2; 12V for GT-FC40.
Ah yes, XHP70.2 6volt. How’d I miss that. Thanks.
Stephenk, the hotspot is 23.7° and the spill is 84.9°
Thanks, LuxWad!
I'm glad you figured it out. 
Thanks for the info. I’ve ordered one. Sustained brightness for size is very impressive.
I love this light!
I really like your review style RC!
Short and to the point and if i didnt own it this would be the review id want to read. I dont need 2,000 words when 200 will do!
I have aluminum gt fc40 3000k and a Stainless Steel xhp70 4000k. and i love them both equally.
There was a post on reddit to the effect that acebeam were working on a smaller form factor of the E70
I am not an expert by any stretch but if it is a single cell light the answer is yes. If it were a 2 series cell light it would be a buck driver. Anyone please correct me if I am wrong.
Yes, XHP70.2 can be wired in 6v or 12v configuration. GT-FC40 is always 12v. If it’s a single cell, it has a boost driver.
Two series cells for XHP70.2 could be buck, linear or even direct drive if wired in 6v. Most XHP70.2 lights I’ve seen are set up for 6v operation.
I updated this review.
Most importantly I added to the very beginning, "The flashlight images in this review are from Acebeam, and the images are being used with Acebeam's explicit permission."
My opinion on this light has not changed. Probably best design I have seen. The light is pure flood with no hot spot. You either love it or hate it. I would have liked a bit more hot spot but that’s just me.
It looks different but the design doesn’t look good w.r.t. the housing. Surely all those holes will fill up with dirt. Not sure how others use their lamps but mine are not kept in a dustless IC manufacturing facility. They get actual use in and around the house, on bike trips, etc., and any holes and edges will get filled/get a layer caked on the side, over time.