Lumintop GT micro

Coyotehawk · January 31, 2019, 2:48am

Wrong thread.

djozz · January 30, 2019, 5:30pm

Nice news. I did hope for a bit better than 52 kcd, but I did not base that on anything precise. What is the (used) reflector diameter?

And a few pictures are always welcome

Texas_Ace · January 30, 2019, 5:33pm

I will measure the reflector in a bit.

Yeah, I am going to take some pictures, just not on the right computer to edit/upload them right now.

wstrachan · January 30, 2019, 5:52pm

Texas_Ace:

I just got my prototype GT micro in yesterday and I have to say, I like it. A nice little pocket thrower.

The throw ratings they gave are spot on what I got, I got 52kcd and 457m of throw on my sample.

Although the lumens are a bit lower, I got 900 lumens dropping to ~800. They are using VERY thin LED wires right now though and the tailcap springs could be a bit lower resistance.

I told them to use 24awg wire on the LED, that should bump the output up some so it could be rated at 850-900 lumens (technically it could now but that is not how I do things).

The thermals are surprisingly good as well, Took quite some time for it to heat up enough to thermal throttle and by that point the cell was at the point of LVP, so not sure which one it was that caused it to step down but think it might of been the LVP.

I have to say, it looks pretty good for a prototype.

When can we order?? I like this idea a lot!

Cereal_killer · January 30, 2019, 6:19pm

52kcd with an XP-L HI huh? Can’t wait to put an XD16 in one!

Texas_Ace · January 30, 2019, 6:41pm

Djozz, the reflector OD is 32mm and the ID is 29mm.

Some pictures of the light:

Texas_Ace · January 30, 2019, 7:05pm

I am not sure, after china new year for sure. So at least another month, most likely a bit longer then that.

Also, not sure if it was mentioned before but the driver in this light was designed by Schoki, it just uses the TA design. He was going to make a really really cool boost / FET combo driver for this light that would of worked with both AA / 14500 but time constraints prevented that from happening in time so we had to revert to a 14500 only driver.

djozz · January 30, 2019, 8:25pm

Hmm, maybe for a rev2 Schoki’s driver is ready then, it is still a holy grail for flashaholics.

After a quick calculation, 52 kcd with a XP-L Hi makes perfect sense, and from my mods sofar with the 1mm2 White Flat (so without cutting edge driving and focusing) I reckon 100 kcd will be achieved.

And that makes me think back of this thread in 2013: REAL pocket thrower (100kcd). Can it be done?

Tom_E · January 30, 2019, 8:44pm

An aspheric, recycling ring and a white flat... Just wish we could get the recycling rings . Dang, darn patent lawyers! Well, lawyers in general!

lmcmann · January 30, 2019, 11:20pm

Wow, old thread. Interesting though. If you work out a way to get 100K out of this light, I’m extremely interested. No need for the V2 driver, I’ll only be running 14500’s.

Dangit, you’ve triggered my addiction again. My girlfriend is giggling hard. And whapping me up-side the head. As usual.

Larry

djozz · January 30, 2019, 11:45pm

^

DB_Custom · January 31, 2019, 12:21am

Larry, isn’t it a thing that you have to buy one new light for every whack in the head? Your girlfriend really wants you to have a large flashlight ~~concussion~~ collection…

lmcmann · January 31, 2019, 1:02am

I keep telling her this. For some reason, she just doesn’t quite understand. She (and my friends) do love borrowing my lights though. Someday I’ll get them all together for a family pic (the lights, that is). That would be kinda frightening even for me though. Been buying customs since long before Mr Bulk on That Other Website. I EDC’d a LionHeart for years. Still have several of them, in fact.

Bah.

This place is so dangerous to my wallet. But awesome for my addiction. We all have to have our therbligs. And I so love tinkering. I do have a small lathe and metal shop, but I can’t do everything that happens here.

The lights that get created on this site are simply amazing. There are a metric Shut Ton of incredibly smart people getting together to make amazing creations. I heartily thank all of you for your time and effort. If I ever get the opportunity to pay for your bar tab, just let me know. It’s the least I can do. Anytime, Anywhere.

Anyway. Between this, the GT70, The BLF lantern, FW3A, GT Everything, I’m hooked. As usual. Keep feeding my addiction, I love it. And, as trouble goes, it’s pretty harmless. Except to my wallet.

Whatever .

Her standard joke is “are you getting another light?”. Why yes, I am. Sooooooooooo?

Larry

DB_Custom · January 31, 2019, 3:01am

Well, if she keeps whacking you on the head you can start singing to her… “You, Light up My LIFE!”

M4D_M4X · January 31, 2019, 12:47pm

mine arrived today

how many Amps do you get @900 Lumen TA?

Texas_Ace · January 31, 2019, 2:52pm

It starts off a bit under 4A and drops to around 3.4A, showing that the cell is responsible for the initial lumen drop, not the light. There may be better cells out now that would not voltage sag as bad.

bidas · January 31, 2019, 5:04pm

Btw what 14500 you used for testing? Just asking because i just have 2A protected and ~3A unprotected… so i need to buy some better ones.

Texas_Ace · January 31, 2019, 7:02pm

I am using some 600ma cells I got from mtn some time back. Windyfire or something like that? They were reviewed pretty well at the time and I have never had a need for anything better. I only owned 1 14500 light before this anyways.

The cells you have should be ok I would think since higher resistance cells will not pull as much power.

M4D_M4X · January 31, 2019, 9:54pm

my nitecore 650 mAh (black yellow) make 3,9A on the GT micro (and 3,8A on a BLF X5)
my shockli 660 mAh (yellow) make 4.95A on the GT micro (and 4.1A on a BLF X5)

unfortunately i fried something (i think a 7135) when using big wires in the head from my bench power supply

the led ia always on (230mA) , but ramps up to high (~2A) above that and also jumps to turbo.

@TA: do you have an idea what i did blow?

bidas · January 31, 2019, 10:06pm

Thanks for the answer Texas_Ace and M4D M4X