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

BrianK · 2017-07-20T18:24:39.000Z

I doubt that it’ll draw huge amounts of current from each cell, so I’m fairly certain it won’t need to be anything special in the way of cells. You’ll want them to match of course. If I’m wrong someone please correct me.

You know to stay away from the Chinese cells that claim 15000mAH and sell for $2, right? They’re too good to be true for a reason.

edit: I doubt protected cells would hurt and probably be a very good idea, but do we know if there are length restrictions? I don’t.

I wouldn’t be at all surprised if there is a group buy on cells as there is/was for the Q8.

The_Miller · 2017-07-20T18:24:35.000Z

Yeah the led is driven at 2,5A
So I’d say trusty good old Panasonic protected 3400mAh would do just fine.

xCentrino · 2017-07-20T21:13:01.000Z

BrianK:

I wouldn’t be at all surprised if there is a group buy on cells as there is/was for the Q8.

That reminds me, Need to get cells for that too.

tjeret · 2017-07-20T21:16:16.000Z

Mezmerize
I’m impressed with the GT progress

tomas.hrubovcak · 2017-07-20T21:27:42.000Z

Wow, I would not even think we would see a working prototype this summer! It is incredible! And the beamshots look good, this light packs some throw!

patmurris · 2017-07-20T21:47:51.000Z

All those exciting projects and GB are irresistible!
Please put me down for one.
Thanks. :+1:

…now trying to remember and keep track of all the interest lists i’m in… and how much it will all cost! :person_facepalming:

will34 · 2017-07-20T21:48:02.000Z

Now time to see some numbers :smiling_imp:

nodoubt · 2017-07-20T22:12:34.000Z

INCREDIBLE….good job to all involved, cant wait :+1:

AlexGT · 2017-07-20T22:14:44.000Z

Awesome pics! Hope they make sure to give that smooth reflector a freaking good polish, Like the K70 which looks flawless!

nodoubt · 2017-07-20T22:42:35.000Z

AlexGT:

Awesome pics! Hope they make sure to give that smooth reflector a freaking good polish, Like the K70 which looks flawless!

yep , would be a shame if they didnt get it darn close to perfect, to maximize the throe

flybird · 2017-07-21T02:58:50.000Z

May I ask if anyone can confirm that this GT light require battery total of 8 cell or we can run only 4 cell but will not get the full 100% performance & Runtime.
Thank you.

rizky_p · 2017-07-21T03:30:38.000Z

I read on the front pake that it takes 8x18650s or rather 2x 4x18650s right? that is a tons of capacity for a modestly driven small XHP35? I think i’ll use BLF GT’s massive battery as a battery carrier for my other light

flybird:

May I ask if anyone can confirm that this GT light require battery total of 8 cell or we can run only 4 cell but will not get the full 100% performance & Runtime.
Thank you.

ToyKeeper · 2017-07-21T04:00:40.000Z

Texas_Ace:

Indeed there are some nice beamshots in the email, very nice indeed. It also has the XHP35 HI LED now as well:

I am getting very excited :heart_eyes:

Pffft. You call that a beam shot?

I’ll show you a beam shot.

southland · 2017-07-21T04:10:59.000Z

Mountain shots look awesome.

The_Miller · 2017-07-21T04:49:36.000Z

Yes four cells ought to work
In fact this proto is a shorty with only one carrier , we wonder if it ia because of easier prototype making and saving weight or why they did this.

Hmm TK, your 10m throw vs GT 2000+m. For portable light I stick with the GT. However do fly by for a nice BBQ

thijsco19 · 2017-07-21T04:52:13.000Z

flybird:

May I ask if anyone can confirm that this GT light require battery total of 8 cell or we can run only 4 cell but will not get the full 100% performance & Runtime.
Thank you.

It requires 4cells in series (one carrier). The second carrier is in parallel to the first one. Making a 4 series 2 parallel configuration.

eekazum · 2017-07-21T04:59:07.000Z

it’s a beautiful light and those beamshots are crazy. Never gunna deny that.

However, seeing that this is a deticated thrower, I can’t help but ask this question:

Considering the emitter is square and the reflector is round, is there some kind of engineeering magic that can be applied to the reflector to optimize the beam pattern for more throw?

I would imagine the light coming out of the corners of the LED are being reflected a few microdegrees away from the hotspot. Or is this an ignorable issue with such a drastic size difference between the size of LED vs size of reflector?

The_Miller · 2017-07-21T05:27:35.000Z

eekazum:

it’s a beautiful light and those beamshots are crazy. Never gunna deny that.

However, seeing that this is a deticated thrower, I can’t help but ask this question:

Considering the emitter is square and the reflector is round, is there some kind of engineeering magic that can be applied to the reflector to optimize the beam pattern for more throw?

I would imagine the light coming out of the corners of the LED are being reflected a few microdegrees away from the hotspot. Or is this an ignorable issue with such a drastic size difference between the size of LED vs size of reflector?

yes good question! I’d like to see the smart guys talk about this too!

BrianK · 2017-07-21T05:49:55.000Z

The Miller:

eekazum:

it’s a beautiful light and those beamshots are crazy. Never gunna deny that.

However, seeing that this is a deticated thrower, I can’t help but ask this question:

Considering the emitter is square and the reflector is round, is there some kind of engineeering magic that can be applied to the reflector to optimize the beam pattern for more throw?

I would imagine the light coming out of the corners of the LED are being reflected a few microdegrees away from the hotspot. Or is this an ignorable issue with such a drastic size difference between the size of LED vs size of reflector?

yes good question! I’d like to see the smart guys talk about this too!

Not a smart guy here, just grounded in reality and evidence. You saw the beam shots right? What in them gives evidence that what is suggested is a problem? There’s a huge difference between theory and reality as it appears to the eye. Or at least that’s my take on it.

The_Miller · 2017-07-21T05:53:23.000Z

no it is valid IMHO, square LED die n a round reflector
too bad no real round LED dies are common practice, would be great in zoomies