BLF GT official support thread [FAQ updated 11 Jan 2018]

I assume you have filled out the issue survey for the GT already? If not the link is in the OP.

I know of a few issues that have been taken care of so far but it is going much slower then I would like. I am hoping now that the shipments are on hold for a little bit Neal can focus on dealing with the issues.

As long as you have filled out the survey you are on the list of issues I will be tossing at Neal every chance I get until it is dealt with.

Question: what is the URL for the site we put the registered mail tracking number in to see the ETA?

Packageradar seems to be one of the better tracking sites. It’s currently giving me detailed information about every stop of the rail journey that my Lii-500 is making from China…

Packageradar didn’t seem to work for this tracking #.
It’s a 16 digit number with no letters, so I think it’s a canada post tracking number, cause that’s their style and I’m in Canada.
But I don’t get a status yet, for one of the following reasons:

  • The item is in transit, but we haven’t yet received it from the sender
  • The item is coming from another country and is not in Canada yet. Track it on the postal website of the originating country first.

So a bit more waiting :stuck_out_tongue:

Got my GT this morning. Thanks Guys.

My tracking number has cleared Canadian customs and has now updated Expected delivery to 2018/03/29! Yay!

I used the contact form (via the site of M4D M4X) but did not receive a reply yet from Neal. I will try to contact Lumintop directly…

Does anyone know what the internal resistance of the included cells should be? Currently charging the first two in my C2-6000 and it’s showing me 78 / 82 milliohms. To me, that seems quite a lot for high drain cells.

Any thoughts?

The include cells(samsung 35E) is not high drain

I see - that explains it, thanks. Not familiar with the 35E cells, and thought they were similar to 30Q’s - should have checked HKJ’s site for Infos! Now I can relax, knowing that I haven’t been sold duds! :slight_smile:

The GT isn’t a high drain light. With 4 cells in it, at most each cell pulls 3 amps. With 8 cells each one only pulls 1.5 amps at most.

So it was decided that a higher capacity cell (3500mah) would be a better match for this light compared to a high drain cell like the 30Q (3000mah). You get more run time in total.

I do get that the light isn’t going to draw a lot of current, with only a single XHP35. But in a previous thread (about the Emisar D1?) it was mentioned that although high drain cells weren’t required, they were nevertheless recommended, due to the lower voltage sag. But with only 1.5A drawn from each cell, I guess we’ve probably entered the area where even voltage sag becomes negligible, if I understand correctly?

The GT was tested with 30Q and Panasonic 3500mah cells (2A at the emitter). Which should be pretty close to the 35E cells.

You’ll note that with the 30Q it stays in regulation a bit longer due to less voltage sag, but the 3500 cell has longer run time. So it’s a bit of a tradeoff.

Anyone else found the 30Q batteries to be a bit too loose in the carriers?

I assume you mean the springs are not compressed enough to keep the battery from wiggling side to side?

This is normal. The carriers are designed for both short and long “protected” cells. So that is about 65mm to 71mm. With a short cell the spring is only partially compressed.

What about the swap of the original led to the CFT-90 one?
I wait until some other guy tries this,so as to see if it is sensible to raise the high cost of the procession.

Vinh over at Skylumen is doing this swap. It has nothing to do with Lumintop or BLF.

Indeed it is a nice mod but not practical for production. So it will be left to modders to do it.

Besides there needs to be SOMETHING to mod or it would not be a BLF light lol.

If you can check my understanding, I would really appreciate it. I do not understand this stuff too well. Looking at this chart, I get the impression the BLFGT does not have to step down to avoid overheating. It looks like it can run at max output as long as the batteries can run. Is this partly correct?

It does not overheat. It will step down if you add heat to it like with a blow torch, but with just the emitter, it should not get hot enough to step down.

At 2.5A, the xhp35 only puts out about 36 watts and the flashlight body is massive with lots of surface area.

The general rule of thumb with really big lights like this is that they can usually sustain about 4k to 5k lumen continously. Some can do 6k and I think the best is the Imalent DX80 at about 7k lumen continously. Any higher than that you’ll need to either step down the power or add active cooling.