thanks for the nice review!
+1,000,000,000,000 
Any talk of price yet?
I heard that D1S is a few $-s more then D1 price
Tom, a member of the German flashlight forum (Taschenlampen Forum) is in contact with Hank and will get a D1s for review
He was told that the D1s will be the same price as the D1
40 ;) to 50 depending on the shop
Toykeeper, great review!. I’m loving my D1 so much that I’ll be buying the D1S as soon as it comes out. The best UI and excellent build quality says it all for me.
It’s good to know that the D1S does not have the quick stepdown of its brothers. I don’t see why I should buy the D1 instead of or in addition to the D1s other than the former being more compact or pocketable. TK have you done a full runtime test for the D1S at Turbo?
I’m pretty surprised to see you compare the D1s to the SR-90 Intimidator, as the Intimidator had a vastly different setup from the factory. If you configure the Intimidator in like kind, there simply is no comparison. With a de-domed XM-L2 and similar amperage as the FET driver, the big SR-90 made 665Kcd for right at a mile in throw.
I really do like the style of this light though and would like to get one as soon as possible, whenever that may be. 
Great review. Can’t wait until it goes on sale!
Great news!
I compared it to the SR90 because selfbuilt measured it at 112.5 kcd of throw, and my D1S gets 123 kcd.
Physically, they’re almost nothing alike. The SR90 is huge, and can throw a lot farther when given a different driver and LED. But in stock form, their throw is pretty similar.
When the SR90 was new, I saw his review and wanted one, but couldn’t justify the price or the size. It kind of stuck in my mind though, as a milestone to aim for someday… and now that milestone fits easily into my purse.
Nope. Mine has non-stock firmware so it wouldn’t be a very useful test result anyway.
However, the graph should look pretty predictable since it doesn’t really need to step down. Typical direct-drive curve starting at around 6 amps and going until LVP kicks in. It’d probably run about 45 minutes before LVP.
In that case, don’t get one. 
These things come in multiple flavors because different people have different tastes.
I like the D1 (18350) because it’s small enough to EDC, and throwier than any of my other EDC-able lights. The D1S throws a lot better, but I find it’s too big to conveniently carry around.
But of course, and the SR-90 was equipped with an Luminus SST-90, an emitter not like anything else on the market in construction and output as well as current capability, and cost right at $400. Vastly different light, in size, output, beam profile and virtually everything else about it. I have the SR-90, got it with a Vinh modified SBT-70 and was asked to change it for better throw. This done, the owner soon got out of flashlights almost entirely and gave me the light. Comparing a vintage model to a sleek new factory racer is not really fair.
Since the D1S is virtually a modified flashlight, straight from the factory, it really doesn’t compare to other lights it’s size until said lights are modded in like kind. This is one of the great things about it, Hank took care of the details so we wouldn’t have to!
I like how it’s a D1 with an enlarged head from the D1’s bezel up, keeping the family resemblance in form as well as UI. Very nice! (tempting to simply recreate my D1 into such a monster as this my own self. )
It would still be useful, because some of us here aren’t planning on staying with the stock firmware 
. Thanks for the estimate anyway.
I agree, to each his/her own. I just wish the D1 could maintain its output at Turbo a little bit longer. But I know that would be difficult without getting into problem with its temperature.
As a side note, in the Thermal Regulation section of your review, I noticed you labelled the y-axis “Relative Brightness” but the figures are in lumens I presume.
When will d1 be in cyan? Have you got some information?
i have, i asked Hank via email.
“Hi， Simon,
Please be advised that we do not have the plan.
The cyan color is exclusive for the D4.
Regards,
Hank”
Nope, but it can be nice on occasion to see how far we’ve come. For example, a $5 Raspberry Pi Zero performs better in almost every way than a computer I got a couple decades ago for $5000.
Five years of development has done good things to the size and price of high-performance flashlights.
You can set its temperature limit higher. I showed one with default settings, which are pretty conservative, and it still went over a minute before any adjustment happened… or about 7 minutes to settle at a stable temperature.
Ish. I used zak.wilson’s ceilingbounce app to measure that, and it relies on my phone’s light sensor… which doesn’t seem to have a linear response. So the values are not in lumens. I scaled the peak of the graphs to match the peak lumen values I had measured earlier with better equipment, but everything below that is skewed.
Thank you. Bad news.