Hahaha that looks sick 
Good luck, cause youâre gonna have to compete with my extreme cooling setup 
Hey TA, sent you a PM about one of your GT XHP-70.2 Drivers, Interested in one!
I think the cooling is not siginificantly worse in the GT, we are talking about ~20W only 
And I power my LED with only 5A current.
The beam is very very tight⌠really cool.
Kenji, out of curiosity, where did you find a lens of the right diameter and also with (about,I see cardboard bits) correct focal length? Or were you lucky?
What about the weight increase?
weight increase: check, accomplished.
I was lucky because this was the only suitable lens left by Enderman at Optolife He chose the A380 lens from optolife and i bought the only one left A037. Focal length 115mm which was almost perfect for the GT from the first drawings (reflector height 120mm). So i bought this last lens in stock some months ago.
Size does matter but weightâŚ. :laughing:
Lower temperature = higher output, even if the LED is very low wattage 
Thatâs why I used a CPU heatsink, cooling fan, and liquid metal, so that I could run my Black Flat up to 6A without a decrease in output.
Who knows, maybe they produced a few more.
When I bought mine from them a year ago it still said 0 stock on the website but when I contacted them they said they had some
Mine underperforming too. I even charged my 8 sanyo GA batteries to 4,23V to make a difference but I canât go above 981000 Cd. My reflector also not the best this yearâs batch.
Today I got a friendâs GT and I will measure it too if it make more candelas.
I also got an Opofire 120mm lens and with a dedomed XP-G2 I got 1,7 MCd with 1 cell at 4,5A.
What distance are you measuring it at? The humidity in the air, dust and a bunch of other things can have big effects on the readings with lights this powerful.
On my own GT depending on the day and distance I have gotten readings ranging from 800kcd up to 1.17Mcd, all with the exact same light.
I think the question was directed at ZozzV6, still here is how we measured our GTâs: in the hallway of Nicoâs cellar, at 13 meter and 23 meter (if I remember it well), the results did not differ much so I do not expect the throw to suddenly go up by much if measured further. The difference between Nicoâs GT and mine next to each other was clear and significant (1.16kcd vs 875kcd).
But Iâm a happy camper already, with your driver and XHP70.2 led I will have a fine modding project ahead
I measured it at multiple distances outdoor. My lux numbers are the following:
10m: 9810 lux
15m: 4290 lux
20m: 2270 lux
25m: 1522 lux
All distances give a similar throw, under 1Mcd.
And I think that given how often he does lux measurements that ZozzV6 has an idea how well his numbers compare to other numbers around, so a faulty luxmeter or one with calibration way off can also be ruled out.
I noticed the hotspot of my GT is smaller than the hotspot of my Palight Boss. Strange, the GT has a dedomed XHP 35 and the Boss has a dedomed X-PL. I bet it is out of focus, but it is impossible to unscrew the head of the LED section. I will post an update IF I ever manage to unscrew it and change the focus height
I know most of this thread is geared more towards drivers and LEDs, but for a filthy casual type like myself⌠Iâm going to ask the obvious - has anyone made an adapter to put a BLF Q8 on the ass end of the GT? The diameter and thread pitch are obviously different, and thereâs no real need for it other than having a long range focused light on one end and a monster floodlight on the other. Forgive me if this is totally ridiculous, my GT showed up yesterday and when taking pictures next to my Q8 for comparison the idea punched me in the back of the head. Or maybe itâs the pain meds from a recent surgery to reattach a muscle, not sure.
Thatâs what happens when you put a larger reflector in a flashlight.
I tried adding spacers under the centering disc. All it did was a donut hole in the beam, without making it bigger or more focused.
It still seems to me the GT hotspot is not as focused as it could be. There is simply too much light wasted around the hotspot. Or at least I think so. Can it be changed or not?
Has anyone tried a thinner centering piece?
The hotspot of my GT looks pretty focussed but when over 10 meter it is slightly darker in the middle. Iâm not sure if that is the nature of the XHp35 Hi led or that the focus is less than perfect, in which case the centerpiece should be a bit thinner. I dare not sanding it down yet in case it makes things worse instead of better.
Btw, on the list of parts that would be welcomed to be sold separately should be the centerpiece IMO.