Unless you are actively cooling the water, putting water in the head will just insulate it more.
Indeed, but i do have standards 
Was just curious because the machine gun barrels in water jackets arnt actively cooled. And thousands of rounds could be shot before a barrel change. But I guess a steel barrel can take a lot more heat few hundred degrees more then a flashlight can so that makes sense
Maybe they were just using water as to collect the heat due to it’s high head capacity.
You would need many litres of water though…
Definitely not possible for a small flashlight like this.
I’m in if it comes with a clip that lets it fit almost completely in a pocket.
Way off topic but you’ll are wondering. A few years ago went to a machine gun shoot at Tiger Valley gun range in Waco Tx. One of the collectors had Model 1910 Maxim Water Cooled Machine Gun. He used a little radiator fluid and lots of water. Belts are 200 rounds long made of canvas with brads. In 7.62x54r hr fired belt after belt, cyclic rate was rather slow. After awhile with the water cap open you could see boiling water erupt out. He’d pour another bottle of water in. Around 0:12 in you can hear the guns slow cyclic rate chugging along Tannerite vs Nissan - YouTube So it cools with lots of water mass. Properly working they are attached to a water can that pulls water into the jacket.
Interesting video, I have wanted to go to that shoot for some time.
The reason the water cooling works on that gun is not the water itself but the phase change that turns it into steam.
The phase change takes a LOT of energy which is absorbed heat, the steam then carries the heat away from the barrel.
If the water jacket was sealed, well first it would explode from the steam pressure, but it would also not keep the barrel cool, in fact a large hunk of metal would work better, fins would work even better.
Now you could make a water cooled flashlight and it would keep the light at 212F degrees (or 100C) as long as you kept the water jacket full. But adding water and having steam boiling out of it come with their own set of issues.
It would generate the deepest awe from the bystanders though (combined with 25+ Klumen of course)
Very true, although if doing this I see no reason to go for anything less then 100k lumens. That should be around 1250-1500 watts of power and would boil water faster then your microwave. Run it off a lipo battery pack and have a 1L water resivor. You should be able to run the light till the battery dies with that, depending on how large of a battery you use.
It could work, it would only weigh 10lb and by the size of a toaster.
That’s acceptable to me. We once lived in a time when this was the norm for a portable flood/spot light, and we survived.
Anyway, back to the thread topic. Someone at SHOT Show please finagle a release date, run-times, and step-downs for this light from their reps. Thanks.
Nvm. Someone posted this on another forum.
I’d estimate 12 cells (in a 3x4 carrier/pack), since the total output on low is 17500 lumen hours (35 h * 500 lm) and one 3500 mAh 18650 cell can total about 1450 lumen hours with a Cree emitter and an efficient driver.
Interesting way to measure output “energy”, like watts hours but with lumens 
Would be nice to integrate this to flashlight specs to measure total efficiency but this is dependent on which cell is being used.
I feel that 6,000lm mode should be more than 100 minutes, each XHP-70 is putting about just 1,000lm which is in a very high efficiency range.
Haven’t see that runtime label before. Yeah it make sense, probably the head is very large for the body to look so thin/normal, almost like the Indimidator series with the 9x, which were 6*18650, reason why I asked.
Now seeing the video of the X9, the dude says 8*18650 3500mAh.
.
I see a rating of 370meters of throw that means around 34Kcd, so a big flooder, without any exaggeration.
Sounds like those fans really work if it holds 25000lm for 5 minutes before stepdown. That is awesome! I hope I get to hold one of these beasts.
Oh yeah I’m in… gota get me that X9! 
Damn it… I knew coming back to BLF is bad news for my wallet, just as I thought I got the brightest 4 XH-P70 light, then this one come out :person_facepalming: ,
I’m not surprised it cost $400, if Nitecore TM36 find buyers, this one will too, I’m not surprise if some of us here on BLF willing to spend that kind of money,Althought there’s nothing Budget about it.
I’ll bite if there’s GB with the price around $2xx
Has anyone seen a lanyard attachment for the X9? Would be nice to sling that over a shoulder than needing one hand dedicated to holding that big honking club of a light.
That’s pretty good if they manage 17500 lm*h with 8 cells. I just did a runtime test on the Olight X7 (which has 4 cells) on medium (1120 lumens) to test an XHP70 light and it totaled 7400 lumen hours. This means, if the numbers on the X9 are right, it would be almost 20 % more efficient. I don’t think Olight would do an unregulated light, which would be more efficient, so it has to be something else.