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

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TopAs
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Please add me to the list for 1x BLF GT + 8×18650 Wink

Far Thrower
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Can somebody tell me which post number the paid spreadsheet is in please.

Thank you.

Pulsar
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Far Thrower wrote:
Can somebody tell me which post number the paid spreadsheet is in please.

Thank you.

Two posts above yours…

JasonWW
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TopAs wrote:
Please add me to the list for 1x BLF GT + 8×18650 Wink

You will be added. It will be mid January when you get the email with all the order info.

Far Thrower wrote:
Can somebody tell me which post number the paid spreadsheet is in please.

Thank you.


Post #13295 You are on it. #143 of the second list. #623 of total paid people.

I try to post all those links on each page.

Texas Ace Lumen Tube and JoshK Sphere calibrated with Maukka lights

Click this to go to signature links. I'm still around, just not reading many new threads.

Far Thrower
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Can you give me the post number as I cannot see it please.

TA

Far Thrower
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I just found them, silly me!!!

DB Custom
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Whew! Had me going there for a minute! It was stated previously that the images taken shining the GT on the radio tower in Pennsylvania were in 0º weather with 90% humidity. That really stumped me, as I thought water in the air should be frozen at that temperature. Sure enough, in zero degree weather the air’s capacity to hold moisture is 10% or lower. Wink

So, the truthful answer to the question of humidity interfering with the GT’s beam in those shots should be that the air had snow in it or was less than 10% humidity. Wink

Edit: It should be declared that I know squat about 0º air temps. I’ve ridden my 750 to work in 12º weather before and worked outdoors, but that was a very rare situation here. Thus my confusion about humidity and zero degree temps. Thanks for bearing with me…
Oh, and the chart I posted is based on Celsius, so it would need a -17.7 degree C rating to equal a zero here in the States.

Far Thrower
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I don’t think CPF does cooperative projects like this as they are too busy squabbling with each other or Greta!

Texas_Ace
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They also don’t like us doing them either. Everytime we have tried to share it over there the thread is locked inside a few hours even though it gets a great response over there.

DB Custom
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Makes us the lucky ones, right? BLF rocks! Big Smile

BrianK
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Why is it that the CPF holds no attraction for me?

Gunslinger686
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Trying to charge 16 batteries with one four bay charger before dark, the struggle is real !
You going to pull those pistols or whistle Dixie
DB Custom
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For the record, I removed the head of my GT and de-soldered the negative lead from the board, soldered in an 18GA loop so I could test actual emitter amperage. At the top of the ramp it is getting 1.93A, by double clicking to Turbo it is getting 2.45A.

My light box shows 2049 lumens. I do not know the actual binning of the emitter I swapped in, but I do intend to buy a replacement of known binning. Wink

Mr.Scott
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DB Custom wrote:
in zero degree weather the air’s capacity to hold moisture is 10% or lower. Wink


Cool chart DB. I’ll likely spend this afternoon googling trying to understand it.

PVCC
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ARsee wrote:

Litefighter wrote:
PVCC wrote:
FRONT GLASS PROTECTION for BLF GT
I’m eyeing these on Amazon and I’m not sure whether to purchase XL or XXL. XXL seems like the better option but I think RobertB bought an XL and his fits perfectly.

XL seemed a "tight" fit to me.
I purchased two of the XXL
I have not received my lights or covers to comment further


Yes, the XL seems too tight/snug fit to me.

Somewhat uncomfortable to put and remove continually...
But it could also be a matter of preference.

Amazon run out of stock of both sizes, so I purchased at B&H.

- This is the LINK for the XL size (in stock):

https://www.bhphotovideo.com/c/product/221936-REG/OP_TECH_USA_8001142_Hood_Hat_X_Large.html

 

- And this for the XXL size (in stock):
https://www.bhphotovideo.com/c/product/221937-REG/OP_TECH_USA_8001272_Hood_Hat_XX_Large.html

 

I'll buy the XL too at B&H, so I'll have both sizes (already bought the XXL that I posted before) and see what's better for me.

It's really inexpensive and gives GREAT PROTECTION.

Wouldn't like to see any scratches on the huge front lens!

BrianK
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I’ve been wanting to do some distance testing with it since our humidity is totally absent right now. Thursday night it was -25°F, Friday it was -20, last night still below 0. The problem is finding a place to test it in rural Maine. It should stay dry for all of next week too.

Mr.Scott
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PVCC wrote:

I’ll buy the XL too at B&H, so I’ll have both sizes (already bought the XXL that I posted before) and see what’s better for me.

I am really interested in your opinion once you have both sizes and can try them both on the BLF GT.

Please post your findings.

Pulsar
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BrianK wrote:
I’ve been wanting to do some distance testing with it since our humidity is totally absent right now. Thursday night it was -25°F, Friday it was -20, last night still below 0. The problem is finding a place to test it in rural Maine. It should stay dry for all of next week too.

I95 is about all I can think of LOL. Power lines could be a good spot

Edit: I was really hoping to get mine friday. Would have been awesome to test it out in that snow

Texas_Ace
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DB Custom wrote:
For the record, I removed the head of my GT and de-soldered the negative lead from the board, soldered in an 18GA loop so I could test actual emitter amperage. At the top of the ramp it is getting 1.93A, by double clicking to Turbo it is getting 2.45A.

My light box shows 2049 lumens. I do not know the actual binning of the emitter I swapped in, but I do intend to buy a replacement of known binning. Wink

Does the entire head fit inside the light box?

Majoroverkill
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Welcome 18000bph! Thumbs Up Come on in, the waters fine Silly Big Smile

Doug S.

BrianK
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Pulsar wrote:
BrianK wrote:
I’ve been wanting to do some distance testing with it since our humidity is totally absent right now. Thursday night it was -25°F, Friday it was -20, last night still below 0. The problem is finding a place to test it in rural Maine. It should stay dry for all of next week too.

I95 is about all I can think of LOL. Power lines could be a good spot

Edit: I was really hoping to get mine friday. Would have been awesome to test it out in that snow

I’ve been giving this some thought. A few miles away there is a straight road that runs between two huge cornfields. There are buildings at the end of it. But I never “clocked” the distance. I just checked Google maps and it’s over a mile long.

DB Custom
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The light box fitment is not ideal, my opening is 4.25” so the GT actually mates up to the light box. This moves the lens back away from the shelf a light normally sits on. Shouldn’t make much difference to a long distance thrower. I can check my DBC-06.7 build and see if the numbers are different at the same position relative to the box.

-25ºF? Insane! Air should be nice and clear, I use Google Earth to locate a clear space, when I tested the TN42 I found an area across our lake that worked well. We have room on a couple of rural roads nearby as well, will probably use the roads for this light as it’s a lot closer and easier to navigate, I had to leave my wife on one side of the lake with the video camera and tripod and find my way around to a boat loading ramp on the other side, didn’t like leaving her over there. She was at a Marina, about 70 yds from the lighted parking area, but still. On that occasion I cleared it first with the local Law Enforcement, just so they’d know if they got a call…. they’d already know what was going on. Also told them I planned to “sight it in” using a laser, so it was all on the up and up.

I have a double clamp that I use for this, clamps on my main vertical of the tripod just under the camera mount, then the second clamp holds the light. Figured if I clamped a laser in then set up the tripod so the laser was on target across the lake, removing the laser and replacing it with the light would also have the light zero’d in on the 8 1/2 × 11 sheet of paper that was the target. Worked pretty nicely.

(to clarify, I had 2 tripods with my wife… the target on one and her camera on another. Then I used a 3rd tripod at my end. Wink )

Thewrights11
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+1 for me. Looks awesome guys.

BrianK
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Dale, yes, -25 without the windchill figured in. We’ve had colder in years past. I’ve seen it below -30.

My brother had a good idea, throw a bunch of water into the air to see if I could make snow. I bet I could if I put the water into an agricultural sprayer. But enough of that; now it’s back to our regular scheduled programming.

Pulsar
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BrianK wrote:
Dale, yes, -25 without the windchill figured in. We’ve had colder in years past. I’ve seen it below -30.

My brother had a good idea, throw a bunch of water into the air to see if I could make snow. I bet I could if I put the water into an agricultural sprayer. But enough of that; now it’s back to our regular scheduled programming.


I heard at -25 like we have been seeing, if you boil water, the steam will turn to snow
BrianK
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I have seen our moist air from inside spill outdoors and ice crystals form out of that.

CrashOne
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DB Custom wrote:
My Dad showing the massive GT against his new (birthday present) Q8…

Easily far and away the largest flashlight in my collection (only some of which is represented here)

And of course, who’s surprised I already got into mine and made changes? Big Smile The centering ring is actually a single large piece of what appears to be Delrin, with holes cut in the black plastic to clear the hold down screws going through the MCPCB, this keeps the centering ring stable and is well done, nice attention to detail…

The full copper MCPCB is DTP and has standard thermal paste under it, the pattern shows the inprint of the pressure the two screws provided…

The driver, as fleshed out by TA and DEL, virtually bulletproof in this application and heavily tested for our satisfaction and ease of mind…

And a couple of comparisons, to the BTU Shocker and the even larger Olight SR90 Intimidator. Added a shot with the Shocker and a Convoy L6. I guess the Intimidator is now the one forced into some timidity….

I got into it the same day I got it, swapped the warm 4000K XHP-35 for a whiter version more to my liking. Smile

Thanks Lumintop, excellent job on this… and thanks again to the team that provided vigilance to ensure everything about it was to our liking…. well done!

That driver is so nicely done, really looks premium Smile

BrianK
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CrashOne, strange that you should mention that. As I was scrolling down and before I got to your comment I noticed the same thing also. It caused me to pause. It just caught my eye. I know nothing about those boards, but it just looks very professionally laid out. Well done TA and DEL! It really is a thing of industrial beauty.

Mr.Scott
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Pulsar wrote:
BrianK wrote:
Dale, yes, -25 without the windchill figured in. We’ve had colder in years past. I’ve seen it below -30.

My brother had a good idea, throw a bunch of water into the air to see if I could make snow. I bet I could if I put the water into an agricultural sprayer. But enough of that; now it’s back to our regular scheduled programming.


I heard at -25 like we have been seeing, if you boil water, the steam will turn to snow

Sorry, I know this is off topic… but it is for science. Wink

Texas_Ace
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Del gets full credit for the driver, I was busy when the driver was designed and unable to help at all.

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