I am proud of the thermal setup on this light, I have had the basic idea for a long time but just never got it implemented on a light before.
It is roughly ~6-7lb right now but it would handle the heat quite well.
Those fins are no luxury.
If it throws the same as GT70 but it’s much brighter I will skip buying GT70 and go straight for this one! Insane!
You don’t think 7x Boost HX in the 120mm diameter head of a GT would out-throw the original XHP35 HI GT? You may be right. I certainly don’t know. But, care to elaborate? 
EDIT: Roughly, each Boost HX would get a 40mm diameter reflector opening with very little overlap or a larger diameter with more overlap between them.
Both of these are kinda the same so I will reply together.
In my experience, a multi-emitter light will generally only have slightly less throw vs a single emitter in the same space assuming that the reflector cups are well made of course.
So… if that be the case, since the Boost HX has a MUCH better luminance than XHP35 HI, can it be true that 7x Boost HX would easily beat 1x XHP35 HI in throw?
Is this why you’ve been asking about overheating issues lately?
Yes, but only for a very short bit of time. The light will get hot quickly and the batteries will also empty quickly.
I want one!!!
Do you think going for a 21700 battery setup would be better for powering this monster?
Yes, this sounds reasonable to me, although not sure how much it would beat it, I would feel safer saying it would match it.
Wouldn’t that be equally true of the XHP-35 HI? Are you saying the 7x Boost HX would need to draw more power to beat the XHP-35 HI in throw?
Not this light in particular, I decided to keep this one Narsil due to the issues with the other light I am working on. Plus I have not seen the prototype yet myself, they just finished it the other day, so no testing on this one yet.
There is another light I am working on though that has been the reason for wanting to use Anduril. It is for sure not ready to be announced yet sadly.
If you think some details on it would help fix the thermal issues, feel free to PM me and I can tell you some there.
This has been debated from the beginning. There are arguments for both sides and I am split 50/50 on the matter myself.
It is not set in stone though, if people really want it to be 21700 even with the added weight it would bring and the fact most people do not have 8 21700’s floating around to use in this light, that can still be arranged at this point I think.
Well, the excuse of “most people” not having “8 21700’s floating around” is kinda moot when you’re already talking about hundreds of dollars for the light itself, don’t you think? I mean, if you’re gonna spend $300 for the light, might as well make it$400 and get all the cells, which can also be used in other lights if need be. Yeah, I know it’s recommended to keep the 8x cells “together”. Another option for some might be to use 8x 18650’s with sleeves.
2S3P 21700 maybe? ;)
As I said, there are very valid points to both arguments. I think that 21700 would be neat but on a technical side there is not a lot of need for it and it would make the light about 1-2lb heavier based on their CAD calculations.
Plus it would need a handle if 21700 was used since the tube would be too large for most hands otherwise. So that would add cost and complexity as well.
Once I get the prototype and see how everything feels I will have a better idea of my opinion on the matter to be honest. I just don’t have one right now.
Interesting idea, that would fix the large handle issue, but then you do not gain much from the 21700 vs 18650 far as current / capacity goes in that case.
Well, you wouldn’t immediately gain a lot, but I suspect that 21700 format development is still fairly heavy, while 18650 is about as good as it will ever get now. So, since you would be gaining a little bit now, but also ready for future 21700 improvements, it might be worth going for it, even with just 2S3P.
Actually I just realized that 2s3p is not possible, we need 4S input which we can’t do with 6 cells. I thought that had come up before but forgot why it was dismissed.