BLF GT (preliminary) modding thread

Yes, and there’s more of them in the house, my son is particularly fond of cactuses. You just gave me an argument to sell the flashlight hobby to the family :slight_smile:

Hi,

i did the first steps with my BLF GTA (Giga Thrower aspheric) :crown: Aiming to kick the Optofires ass which uses a 120mm lens as well. The light already fires up, but is bad focussed at the moment. Quick and dirty put together for a first measurement. I measured 1.7 Mcd (8metres) already - without the Wavien Collar.

Greetings

Kenjii

The battle of the throwers! :smiling_imp:

This looks so cool :+1:

Reminds me of the movie War of the Worlds

Been thinking of what kind of mods for this light and started to wonder what kind of IR LEDs are available these days that would work well with the GT.
Anyone else looked into this as of yet? If so, what kind of thought/research have you done? Any IR LEDs compatible with enough output to make it viable?

Hahaha that looks sick :smiley:

Good luck, cause you’re gonna have to compete with my extreme cooling setup :stuck_out_tongue:

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 :wink: 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. :wink:

I was lucky because this was the only suitable lens left by Enderman at Optolife :smiley: 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 weight…. :laughing:

Lower temperature = higher output, even if the LED is very low wattage :slight_smile:
That’s 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 :stuck_out_tongue:

Mine underperforming too. I even charged my 8 sanyo GA batteries to 4,23V to make a difference but I can’t go above 981000 Cd. My reflector also not the best this year’s batch.
Today I got a friend’s 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 GT’s: in the hallway of Nico’s 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 Nico’s GT and mine next to each other was clear and significant (1.16kcd vs 875kcd).

But I’m a happy camper already, with your driver and XHP70.2 led I will have a fine modding project ahead :slight_smile:

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

Check your Candela, from 20m to 25m it jumps back up…Lux to candela (cd) conversion calculator

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 have done a few
:smiley: