BLF GT (preliminary) modding thread

Thanks Ta , this is awesome !


Lux reading at 7 meter throwing distance for BLF GT.
1.163Mcd which give a throwing distance of 2157 meters.
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Measured at 20 meters. 1.153Mcd
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Thrunite TN42.
Measured at 10 meter 701Kcd

TN42 should be doing 750-800.
I would recommend investing in a real luxmeter.

NO 750Kcd to 800Kcd is much much too high for a non mod TN42.

Where did you get that from? Highest number I’ve seen is 728… The rest hover around 700.

You’re right, my bad, it’s 700-750.

Any suggestions?

I see 720Kcd from my TN42.

Read above, but the LX1330B is the best budget luxmeter.

OK,I’ve got it right now from Amazon.de.

I would get the “real” LX1330B (Dr. Meter brand) , but shipping + import fees is 29$ extra !

Why do you say the others aren’t real.
Do you have a reason to believe they are different?

Dr. Meter released the LX1330B , and later the other no-name LX1330B appeared . I don’t know if the internal components and it’s calibration are the same or not .

The one that TLF tested and found good was actually no-name:

The first test of the XHP70.2 driver for the GT went well tonight. We just need to figure out how to bypass the carrier button top springs.

Some tweaking is needed but at least it works. More will come as I have time.

Maybe awg 22-24 outside the spring will fit under the brass button , haven’t tried it .

For a DIY setup there are a few possible options but they are not simple. I am trying to find a more consistent option that is simpler.

Worst case this is what we might have to do.

I have the worst case situation setup in the GT right now with the ultra low Vf 80cri 4000k emitter. I am going to do some testing and see what the limits of the system are. I am worried that it could overdrive the emitter as it maxes out lower then P2 bin emitters.

Are you testing a buck driver for xhp70.2 ?

How many amps can provide max ?

I am testing a Texas Avenger driver for the xhp70.2. Since the GT is so large it was pointed out that we might as well give it all the power.

The stock buck driver is good for around 6A, which is good enough but also leaves a few thousand lumens on the table with a P2 bin emitter that maxes out around 10-12A (at 12V).

I plan to order a P2 emitter for testing this weekend or next week.

In the early test I am guessing it was around ~7A but I was only using laptop cells since I did not want to melt the springs. With high drain cells it would be a lot more power.

Properly setup I am guessing it will be around ~10A+ with high drain cells and bypassed springs on a P2 emitter. That should be good for over 9k lumens (possibly peaking over 10k lumens for the first few seconds).

Oh my God…
And what about the throwing,700K,more,less?