Put three fingers with a small gap between them in front of the other arm and blow on them, feel how little air goes through and around.
Now place your finger tips on your arm so the fingers are round, like the little vent holes on this round head, blow, even less air goes through and more hits your arms above where the fingers are placed.
Water and air will go the way of least resistance.
So the small fin wide gaps on this light are only good if actively cooled I think.
Resistance increases as you apply pressure by blowing. I think that is a difference with the cooling principle of this light, which is based on convection (temperature difference, ambient pressure). A small breeze when walking with the light outside should make a lot of difference.
We will have to see
My bet is that with unexposed small fins and a harsh stepdown they most likely use, covering the holes will not make a large difference (IF there is no fan there so it is not cooled actively)
And since they not show a fan, something that would be really cool and a good thing to emphasize I guess that it steps down based on time when the saturation point of the aluminium is reached (probably tested in a safe 25C environment and that after that it is based on temp.
And looking at the modes, it probably kicks back to 5K lumens initially when thermal monitoring has not engaged before the stepped down time (in a hotter environment.)
As a matter of fact, if not actively cooled in such relative small light for this high price I would expect some sophistication in stepdown management and development 
Current Imalent lights are temperature controlled (50 degrees C). I’d say thermal management is good with Imalent lights; it works well. Regarding price, well I can only feel Imalent “artificially” keep price fairly high, then you get good discount making the products really attractive. Look at current line up of DN/DT models; either there is a flash sale on a regular basis for almost half price, or you have an always working discount code also reducing the price to about half. Who doesn’t know “MACDEAL” by now?
But you know Miller, the DX80 is a really good example of how new flashlights keep us geeks busy and what’s to like about them. :+1: 
Heheh agree
[quote=The Miller]
the DX80 has two vent holes on either side, could be active cooling but maybe not.
An RV refrigerator runs from an ammonia mixture being pushed around through tubes by a single small flame. Would it be possible to put a small tubes system around the head and it would use the heat from the led’s to push the refrigerant around to cool the whole head and even the handle off?
Heatpipes in a flashlight is an interesting concept, especially flat ones.
+1 for Q16 ! haha
Think of a small active cooling. There are very small fan like 20-40mm ones…running them at lower voltage don’t make too much noise. Im’ thinking of fins through the whole head body with a small fan on one edge.
There was a old amplifier of very high quality,a Sanyo Plus P55 series,which had a freon type of cooling.
I’m glad to finally hear more about this. This rumored light is why I skipped their first flood monster.
I’m back 
Yes, like you said, the quality of the light and warranty really matters speccialy in high priced lights! The G30 have chronic issue with a short-circuit like was happened to me and Klarus do not made some recall or even replied who emailed the support
So, I almost the bought the DT70 when the preorder in Banggood was avaliable and some voice telled me to wait for review……. SO when the review in taschenlampe comes…… I’M GLAD TO NO BOUGHT THIS
The promisse was amazing, very high output with lage beam which come over a kilometer
Some mistery happened while I’ve sleep, they clam now 800m
I Bought the TN40 and I’m still happy now
Regarding price, Banggood has the DX80 listed for $380, but there is already a coupon discount present on Banggood’s DX80’s page. The discount value is 25%, reducing the price to $285 or 245 Euro.
So this is the starting price with eight batteries included. Well that’s dang nice isn’t it?
Hmm let’s do a little napkin calculation here, as we would do when starting a new project.
All rough estimates on the little we know 
Housing 10-20
Switch orings little stuff 2-4
LEDs 40-60
Ledboard 10-12
Lens 10-12
Driver 25-40
Strange CPU style cooling 5-10
Fan? 5-7
Cells 20-32
Electronics 4-8
Box 5-10
So between 136 205
We would go for an estimate somewhere in between so it could very well be $175 just to make it.
Of course they want profits, vendors want profits, development and marketing.
So yeah $250/275 seems fair.
Way too much to justify
If it has no active cooling and the stepdown is to a long running 2K or something, I would not want it, we can do better ourselves
U$285= R$900
So, assuming the basic salary here is R$1000, its very cheap 
I remember when you did a rap “wy pay your rent if can spend in imalent?”
Thats real
If I plan on buying and keeping any item for my personal use:
If I can’t afford it, the price is too high, no matter how low the price may be.
If I can afford it, the price is never too high, no matter how high the price may be, if I want to buy and keep the item for my personal use.
People feel comfortable spending money in a particular range. Some people like to spend $1 on a flashlight, others like to spend $10, other people like to spend $100 on a flashlight, others like to spend $1,000.
It is all up to what an individual person likes to spend and is willing and able to pay.
Well, anyway, back to the flashlight itself: I am interested in this item, so I am going to keep my eyes open as to what first takers have to say.
Yes you are right when tell its personal which someone will spend in the light, but when tell about the light is cheap or expensive you are totally wrong….
Like I said, I left the DT70 for the super disapoint specs and quality issues and bought a TN40S which costs much more than imalent, but it was very cheap in comparison…….
I avoided:
*Contemplated with DOA light (a great number of users suffered it)
*Needed to mode to use non proprietary batteries
*Bought a light with liar specs which I will regreat at the first moment I’ve turned on
*Needed to support the huge and fast thermal stepdown
*(Possible) needed to create another thread here to get attention by manufacturer to solve my issue (not guarantee if it will solve or not)
Otherwise, with TN40S mine experience was great:
*Not worried about the big bad history of fails
*I put the batteries wich I want without cares if the light will switch on or not
*The specs are higher than informed
*Have NO frills in turbo mode even in painful hot to hold condition, making possible to cool with water or not care about if was a cold and windy night
Yes, that DX80 if going to same way of DT70 is VERY expensive……
The question here is “what is your money for you?”, for me, I not spend my money in some doubtful product, I wil research and evaluate if this produtc deserves my money!
I did the same.TN40S-TN42-TN36 2017. 
If I understand correctly some people have actually ordered it via M4DM4X
I so hope they will post about it!
yeah got the Mail too, actually the price is good considering you also got 4x18650, but Q8 and BLF GT is so close i am gonna keep my money for that.