BLF GT (preliminary) modding thread

Nope, my light is still safe and sound with me, I still love the giggles engraving on it.

I did post the laser engraving file for the GT so I am guessing someone else used it to engrave their own.

Does it count if you measure the lux at 5m or should I be measuring it from farther away
Cause my GT gets 1,235,000 cd at 5m

5m is fine, usually the readings are a bit higher at 10m.

^That.

5 meter is bit short, you may be off a few percent, some people even claim that 20 meter is not enough for good collimation and thus correct measurement. And technically they are correct.

But then I claim that the error of their luxmeters is more significant than the difference of measuring between 5m and 40m.

Moreover, the focuspoint of not all GT’s is at infinity as it should be, so if you have a very unlucky GT, the best collimation could even be at 5m.

My first mod

CW-ing my GT with 6500 k

So I’ll test it tonight and if the cd drops off after 5m it’s not a good focus? I damn well hope it isn’t cause that will bother me is there any way to fix it if it’s out of focus?

And if it changes anything I switched my led to a 5700k

Raise or lower the reflector in relation to the led.

It dropping after 5m can also be a sign of humidity / dust in the air.

Thanks!

Oslon Flat Black + Lexel Driver + Optolife Lens - 1.86m lux

Wavien collar coming soon.

Very nice, I have on of those optics myself but have not had time to figure out the mounting setup, I figure I will 3D print it but just have not had time.

How did you mount yours?

4” PVC cleanout adapters (2) are what I used. They were easy to chop and sand to get good focus and retain the lens from the top.

Great job on the mod!
It’s not easy to mount aftermarket lenses :stuck_out_tongue:

Initial measurement with the Optolife lens, flat black, and wavien collar is 3.2 mcd measured at 15 meters. The numbers can possibly be improved with fine tuning, but I am happy! I’m running the flat black at 4.5 amps.

After some more focus tuning and final assembly, at 20 meters, my modded GT measured at 3,508,000 lux! Super!!

(Beamshots next!)

Not bad at all, makes me want to give it a try. With that new “flat black” that has a neutral thermal pad, it would be far easier now. Could even use the stock driver I think with a minor mod.

What driver are you using?

I’m using Lexel’s BLF GT Oslon driver set at 4.5 amp max. In the case of the GT, the neutral thermal pad is not a big advantage because the light body is not used for the return.


Modded GT

The Sceptre

In person, the beam from the GT appears to go farther. It’s quite impressive.

pscal….very awesome mod! I love it! I was pretty happy with my GT until I read over your mods. Now I’m gonna end up cracking my open before long. Thanks a lot! :wink:

Oh, I would love to see some beamshots of a water tower or building from some distance. Would be even better to compare with a stock GT.

Thanks! I no longer have a stock GT for comparison - best I can do is an MF04s. Getting beamshots is also challenging for me right now because I have a toddler and an infant that dominate the night hours. But, if I can get away, I’ll try to get some shots worthy of this GT.

pscal’s aspheric builds are right up there with deft-x quality, but with 3x more lux, great job :smiley: