[PART 1] Official BLF GT Group Buy thread. Group buy officially closed! Lights shipping.

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maukka
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Arrived here as well! Horrible packaging with gaping holes, but no damage to the head or body.

https://imgur.com/a/E0FRW

And at maximum ramp level measured 4100K at a perfect tint of duv -0.0009.

Joey Adams
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Maukka

I vote that for any other blf group buy that you are purchasing a light in, we make dang sure you get one of the very first lights. Your analytical capabilities are fantastic (just wish I could understand it all)

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Ok, I didn’t bother reading the last many pages as I saw it was mostly drama, remember, things get heated and the thread will be closed.

If there is something important that I need to see, please point it out to me.

Texas_Ace
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maukka wrote:
Arrived here as well! Horrible packaging with gaping holes, but no damage to the head or body.

https://imgur.com/a/E0FRW

And at maximum ramp level measured 4100K at a perfect tint of duv -0.0009.

Great, test, confirms my eyeball that the tint is really good for a 70CRI LED.

Have you tested it in turbo? I am guessing it will get a little cooler in full turbo.

maukka
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Didn’t test turbo.

I know the beam doesn’t converge when measuring at close distance, but for what it’s worth, I got 860kcd at 6.1 meters on the max ramp (6.1^2*23106 lx on the CRI measurement above). So even this close, it’d probably be around 1Mcd on turbo.

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Yep, those numbers sounds about right from my own testing as well. It generally takes about 20m to get the peak throw numbers and turbo will make a difference in meter readings.

I have had both of my GT’s in momentary mode the last few weeks, it is fun to just blast them.

blinker
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Joey Adams wrote:
Maukka

I vote that for any other blf group buy that you are purchasing a light in, we make dang sure you get one of the very first lights. Your analytical capabilities are fantastic (just wish I could understand it all)

Thumbs Up

Not a flashlight guru, but like them just the same.
Misspellers of the world UNTIE!!!

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Mine is doing 850kcd in turbo with 4 cells NCR18650B panasonics (not high amps) but thoigt it only draws 2A per battery? Or am I wrong? 

 

So max throw is only possible with 8 cells?

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ChibiM wrote:

Mine is doing 850kcd in turbo with 4 cells NCR18650B panasonics (not high amps) but thoigt it only draws 2A per battery? Or am I wrong? 


 


So max throw is only possible with 8 cells?


At what distance you have put the luxmeter?
ChibiM
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10 meters

Texas_Ace
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ChibiM wrote:

10 meters

Part of it is the distance but yes, with low drain cells like that and the higher then expected Vf of the LED (we have planned on 1V lower when designing the driver) it will fall out of regulation much faster then planned.

For best results try some high drain cells and put in 8 cells if you can and see if the readings improve.

With only 4 laptop cells (about the same quality as the ones you are using), I noticed I could not hit full 2.5A to the LED in my light.

With GA cells it worked fine though and 30Q worked even better for regulated runtimes.

maukka
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Texas_Ace wrote:
I have had both of my GT’s in momentary mode the last few weeks, it is fun to just blast them.

That’s the only way I’ll use it. Same thing with the D1S. That’s what throwers were made for.

Just got back inside from the first outside test and it’s a ridiculous beast. Good job GT team!

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My GT in two parts arrived yesterday, too. The performance is impressive and matches what has been seen on a bunch of beamshots. In total darkness with average visibility conditions I didn’t have enough distance to exceed the usable throw without moving further. Easily illuminated targets within 1 kilometer. Nice,team, manufacturer and other parties involved!

The minimalist packaging might be due to some shipping rate limits at 1 and 1.5 kg, as the boxes had Finnish Post measured weights of 1.47 and 0.99 kg. I don’t know why the original declaration says 0.5 kg for both but I guess some involved party on the way might not have a scale at their disposal. Smile

I was kind of scared to see the two balls of brown cardboard or toilet paper that had been submerged in water. Miraculously the window was not broken, and it appears others had the same result. Good job, I guess. The actual light arrived undamaged even if a bit dirty. A couple of scratches were to be expected from any mail shipment, to be honest.

If someone has one out of two missing, I got a theory. Finnish Posti decided to deliver the tube with batteries into my unattended mailbox while the headpiece was to be picked up from a post office. Obviously they are required to only hand out a registered package against signature and ID, but this worked out this time. In case it wouldn’t fit, the mailman would have to take it back and it could take a couple of days to show up again, especially when the box including the label could very well be ruined and unscannable. Don’t panic, but ask for the tracking data and if available, use it to search locally. You would not want it to be sent back in a week or two.

maukka
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What was funny is that the other tracking number didn’t show any movement via any tracking service between leaving the origin country and being available for pickup from the post office. The other package tracked fine all the way. Both arrived at the same time in the end.

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Picked up my GT this afternoon from the post office!
The boxes were very clean and undamaged, they only wrote my name on the side of the box with a marker so it was more easy to find between all the other packages.

Will try to post images later, did not even open it yet Cool

Thijsco19 wrote:

a regular symptom of flasholism Big Smile

“Flasholism is the most severe form of flashlight use and involves the inability to manage your flashlight use habits. It is also commonly referred to as flashlight use disorder. Flashlight use disorder is organized into three categories: mild, moderate and severe. Each category has various symptoms and can cause harmful side effects. If left untreated, any type of flashlight use can spiral out of control.”

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maukka wrote:
What was funny is that the other tracking number didn’t show any movement via any tracking service between leaving the origin country and being available for pickup from the post office. The other package tracked fine all the way. Both arrived at the same time in the end.

Oh, I forgot. Neal’s bag and cap set arrived at the same time with the 2 halves and quite possibly had been sent at the same time. A very similar Malaysia Post code with it, too. Notice in mailbox to pick up at the post office with ID.

The included nipple modified 35E seem OK. I kind of panicked looking at the (notoriously inaccurate) resistance values shown by my Lii500 charger as they were on the high side. Only just realized I was comparing them to a set of 30Q batteries I had ready for initial testing. How silly of me. Big Smile

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Texas_Ace wrote:
ChibiM wrote:

10 meters

Part of it is the distance but yes, with low drain cells like that and the higher then expected Vf of the LED (we have planned on 1V lower when designing the driver) it will fall out of regulation much faster then planned. For best results try some high drain cells and put in 8 cells if you can and see if the readings improve. With only 4 laptop cells (about the same quality as the ones you are using), I noticed I could not hit full 2.5A to the LED in my light. With GA cells it worked fine though and 30Q worked even better for regulated runtimes.

I just ran it with 8 cells, all the same Pannies, and hit 930.000..... 

I don`t think I will be able to see the difference Wink 

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!IMG_9757!
Not the best quality photo but on the left my GT got it today with registered. On the right my dads GT that he got with DHL couple of weeks ago(beamshot about 3 meters away from wall) Reflectors are pretty different if checked by eye. Mine has got a smaller hotspot. When shining further away the difference is less noticable.

"It wouldn’t be so bright if there wasn’t a shadow every once in a while." - Jason Mraz

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Package

Tube

Head

Almost spotless mirror finished, very small machning lines

The GT makes the L6 look like a baby

Crappy beamshot with cellphone

At first, i put in some 30Q’s and fired it up. To be honest i was a little disappointed, i thought is that everything?
Then i took it out in the field, and man, i got a huge grin on my face Big Smile

According google the trees are 400 m from this point, the pic is very poor, but it lit up the trees like it was nothing!

This thing is a beast!

Thijsco19 wrote:

a regular symptom of flasholism Big Smile

“Flasholism is the most severe form of flashlight use and involves the inability to manage your flashlight use habits. It is also commonly referred to as flashlight use disorder. Flashlight use disorder is organized into three categories: mild, moderate and severe. Each category has various symptoms and can cause harmful side effects. If left untreated, any type of flashlight use can spiral out of control.”

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polarweis wrote:
!IMG_9757! Not the best quality photo but on the left my GT got it today with registered. On the right my dads GT that he got with DHL couple of weeks ago(beamshot about 3 meters away from wall) Reflectors are pretty different if checked by eye. Mine has got a smaller hotspot. When shining further away the difference is less noticable.

My GT, on the right, has a bigger and less intense hotspot. The reflector of my son’s GT is better, more mirrorlike, as mine is more OP. 

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So I got a nice little delivery today as well which was a huge surprise as I wasn’t expecting anything till into March sometime instead of the 11 days total! Big Smile

Minor damage to the bottom of the package


well it made it threw the outside box to the GT’s box…. Sad




Everything looks perfect. Batteries are charging up so hopefully I can play a little before I have to go to bed. Thank you so much to everyone who was involved in anyway with this project. After a very crappy last couple of weeks (work, etc) this has brought a massive smile to my face! So glad I have a week of holidays after tomorrow!!

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Fun experiment with the GT: try blocking the beam with your hand… you can’t get the hotspot to disappear!
It looks like the beam goes THROUGH your hand. LOL

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polarweis wrote:
IMG_9757
Not the best quality photo but on the left my GT got it today with registered. On the right my dads GT that he got with DHL couple of weeks ago(beamshot about 3 meters away from wall) Reflectors are pretty different if checked by eye. Mine has got a smaller hotspot. When shining further away the difference is less noticable.

Is the light on the right at a brighter level making the hot spot look larger on camera?

Can you try this picture at a much lower brightness level like moonlight?

Anything above moonlight my camera makes the hotspot appear bigger.

At 9 feet, I get a hotspot diameter of 8” or 20.5 cm roughly.

My corona is also much smaller.

My Convoy L6 thread with XHP70.2, Texas Avenger FET driver, Narsil v1.2 ramping firmware (old), lighted side switch and cut down SMO reflector. Lots of amp draws on stock driver as well. 

My Supfire L5-S thread with XHP70.2, 26350 cells (4,100 lumen!), Texas Avenger FET driver, NarsilM v1.0 ramping firmware and lighted side switch. My mini L6! 

9 NarsilM user videos for BLF Q8, GT, GT Mini and ROT66

Texas_Ace BLF Calibrated Lumen tube

Maukka Calibration Lights for DIY Lumen Measuring Devices

JasonWW
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Here’s a tip for removing the bezel. Loosen the upper head from the light engine section first, this takes pressure off the o-ring on the glass and makes the bezel much easier to turn due to less friction.

Why didn’t I think of that sooner. Duh. Wink

My Convoy L6 thread with XHP70.2, Texas Avenger FET driver, Narsil v1.2 ramping firmware (old), lighted side switch and cut down SMO reflector. Lots of amp draws on stock driver as well. 

My Supfire L5-S thread with XHP70.2, 26350 cells (4,100 lumen!), Texas Avenger FET driver, NarsilM v1.0 ramping firmware and lighted side switch. My mini L6! 

9 NarsilM user videos for BLF Q8, GT, GT Mini and ROT66

Texas_Ace BLF Calibrated Lumen tube

Maukka Calibration Lights for DIY Lumen Measuring Devices

Joey Adams
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patmurris wrote:
Fun experiment with the GT: try blocking the beam with your hand… you can’t get the hotspot to disappear! It looks like the beam goes THROUGH your hand. LOL

I spent a lot of time doing that and other neat tricks for the first couple of days after I received mine. Another neat trick is to go out on a completely (as possible) dark night and ramp the power as low as possible (not talking about accessing moon just the bottom level of the ramp). Then try to see how far you can detect light. It’s absolutely insane how far this reflector will throw that small amount of light output. This is a very special flashlight and I am so happy that I joined the blf for these and so many other awesome opportunities to see just what is possible. To be able to get advanced and intuitive designed flashlights at a budget price is just icing on the cake imho.
TA I commend you and all the other collaborators on this project. All of you do a great job of proving that “budget” most certainly does not mean CHEAP!

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IMHO, This light is the most amazing light i have ever touched. You can call me anything you want, cause I got 2. The only thing that is better is the great light head condom and carry bag that Neal got together. Thank You to the team! There is a round of golf claps to Neal for the fine accessories!
Always Respectfully,
Andrew Whitehill

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Throw me in to darkness wrote:
Joey Adams wrote:
Throw me in to darkness wrote:
SamHaLeKe – you have the “final product” in your hand, noob. Do you think 850 prototypes got sent out? Facepalm

And you wonder why you receive rude votes from time to time

No, I wonder why people take offence to a few words. How is ‘noob’ offensive? It literally means ‘newbie’.
Come on fella, that’s just an absolutely ridiculous thing to be offended by. Should I have called him something worse instead, to warrant the 2 rude marks I got?
It astounds me sometimes how offended people get over literally nothing – and things that aren’t even directed at them. But so be it. If ‘noob’ is offensive, I’d better quit calling people ‘newbie’ sheesh Facepalm


I doubt it was the use of the word noob.

In my opinion, you come off sounding disrespectful or arrogant like your superior to everyone else. Even your post above sounds kinda rude. I’m not a good judge of tone, but maybe you sound aggressive or that you want to fight?

I don’t know exactly what it is. Maybe based on the words you use and the things you say, your triggering people? IDK.

On a friendly forum like BLF were we try to be helpful and nice, any type of negative attitude stands out.

Maybe someone else can explain it better?

My Convoy L6 thread with XHP70.2, Texas Avenger FET driver, Narsil v1.2 ramping firmware (old), lighted side switch and cut down SMO reflector. Lots of amp draws on stock driver as well. 

My Supfire L5-S thread with XHP70.2, 26350 cells (4,100 lumen!), Texas Avenger FET driver, NarsilM v1.0 ramping firmware and lighted side switch. My mini L6! 

9 NarsilM user videos for BLF Q8, GT, GT Mini and ROT66

Texas_Ace BLF Calibrated Lumen tube

Maukka Calibration Lights for DIY Lumen Measuring Devices

Texas_Ace
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Bozlight29 wrote:

polarweis wrote:
!IMG_9757! Not the best quality photo but on the left my GT got it today with registered. On the right my dads GT that he got with DHL couple of weeks ago(beamshot about 3 meters away from wall) Reflectors are pretty different if checked by eye. Mine has got a smaller hotspot. When shining further away the difference is less noticable.

My GT, on the right, has a bigger and less intense hotspot. The reflector of my son’s GT is better, more mirrorlike, as mine is more OP. 

Interesting, have you taken any lux readings side by side with fresh cells in each?

polarweis
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Texas_Ace wrote:
Bozlight29 wrote:

polarweis wrote:
!IMG_9757! Not the best quality photo but on the left my GT got it today with registered. On the right my dads GT that he got with DHL couple of weeks ago(beamshot about 3 meters away from wall) Reflectors are pretty different if checked by eye. Mine has got a smaller hotspot. When shining further away the difference is less noticable.

My GT, on the right, has a bigger and less intense hotspot. The reflector of my son’s GT is better, more mirrorlike, as mine is more OP. 

Interesting, have you taken any lux readings side by side with fresh cells in each?

I dont have any lux measuring equiment.. but by looking just with the eye you can see a pretty big difference. When looking at both reflectors you can see the ring marks in both but apart from that mine is pretty clear, my dads light is less mirror like. It almost functions like a very ligt OP that makes the hotspot just a little bit wider. I will try to make some more beamshots also on moonlight.

"It wouldn’t be so bright if there wasn’t a shadow every once in a while." - Jason Mraz

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polarweis wrote:
!IMG_9757!
Not the best quality photo but on the left my GT got it today with registered. On the right my dads GT that he got with DHL couple of weeks ago(beamshot about 3 meters away from wall) Reflectors are pretty different if checked by eye. Mine has got a smaller hotspot. When shining further away the difference is less noticable.

If the reflectors so much different, they can not be good focussed for each reflector.

For my GT, I think its not well focussed, the beam is getting thicker and thicker.
I compared my GT with my Astrolux MF02 and it seems that the GT is not realy brighter than the MF02, but the hotspot is smaller than the MF02 (which is not good focussed too). But you have to remember, that I have a faulty LED: http://budgetlightforum.com/comment/1283157#comment-1283157

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