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

[Keisari]

@Texas_Ace

And the sense resistor, a R050 2512 will put you just under 5A in turbo and be a little easier on the driver. An R047 will put you right at 5A but is a little harder to find.

These will typically have 1% or 0.5% tolerance today? I’m guessing that’s kind of necessary with such a low resistance, considering the typical application. If one could find a supply with a traditional “bad” 5% or even 10% tolerance, it would make things so much easier and you could just hand pick from a batch of 50 or 100.

[Texas_Ace]

@Keisari

@Texas_Ace

And the sense resistor, a R050 2512 will put you just under 5A in turbo and be a little easier on the driver. An R047 will put you right at 5A but is a little harder to find.

These will typically have 1% or 0.5% tolerance today? I’m guessing that’s kind of necessary with such a low resistance, considering the typical application. If one could find a supply with a traditional “bad” 5% or even 10% tolerance, it would make things so much easier and you could just hand pick from a batch of 50 or 100.

Yes, you would want 1% for sure, they are not that hard to find in the USA, Digikey, Arrow or mouser will all have them but overseas it can be harder.

[xray291]

Hi

Is there a specific plastic toolbox that you are using to make the case? just curious

Thanks

[Charga]

@Texas_Ace

Here is a list that Neal is working on of the orders so far. He said there are still another ~30 orders he needs to verify and update.

BLF GT balance payment confirm.xlsx - Google Sheets

The yellow highlights are orders he has not received (or not updated yet) the phone number for.

Please check the list for your order if you have any questions.

Paid with Registered Shipping but not on the list (yet) - please update! :partying_face:

[leaftye]

The big waterproof padded case at Harbor Freight is $40. It has enough room for the length of the GT with over 2 inches to spare. The biggest con about it is the plastic it’s polypropylene and doesn’t appear to be fiberglass reinforced. That’s probably okay for a few years of use, or indefinitely as a shelf queen, but I’d accept that for now until I find a nice deal on a tougher case.

[lawallac]

@Enderman

@lawallac

New * Cree XD16* , extreme density LED. This could be a game changing LED for throw lights.
284 lumens per mm2. 726 Lumens at 2A 6W. 1.6mm*1.6mm Can’t wait to see how it respends to higher currents.

http://www.cree.com/led-components/products/xlamp-leds-discrete/xlamp-xd16

The black flat does 900lm/mm^2.
You can also see from the datasheet that the 726 lumens at 2A is already at 400% output and it doesn’t look like it will increase to much more than 500 or 600% from the curve.
Assuming that you can get 2-3x more lumens like other cree LEDs that would still be less than 600-900lm.

Cree’s 12/6/17 press release says it the first led to surpass 280lm/mm^2 lumen density. I know the top throwing emitters are in the 230-250 cd/mm^2. The units are different lm/mm^2 and cd/mm^2 but they are very related. So, does the Oslon chip really have 3.2x the lm/mm^2 of cree’s latest?
http://www.cree.com/news-events/news/article/cree-launches-industrys-first-extreme-density-led

[leaftye]

I don’t see the appeal of the XD16 in flashlights aside from showerheads. It could be really good for automotive lightbars though. Most could use more throw. With them mounting just above the windshield, too much light lands on the hood. I’m not holding my breath though. Almost all the cheap chinese lightbars don’t use Cree, and many of those that say they use Cree are lying.

[The_Driver1 (The_Driver)]

@lawallac

@Enderman

@lawallac

New * Cree XD16* , extreme density LED. This could be a game changing LED for throw lights.
284 lumens per mm2. 726 Lumens at 2A 6W. 1.6mm*1.6mm Can’t wait to see how it respends to higher currents.

http://www.cree.com/led-components/products/xlamp-leds-discrete/xlamp-xd16

The black flat does 900lm/mm^2.
You can also see from the datasheet that the 726 lumens at 2A is already at 400% output and it doesn’t look like it will increase to much more than 500 or 600% from the curve.
Assuming that you can get 2-3x more lumens like other cree LEDs that would still be less than 600-900lm.

Cree’s 12/6/17 press release says it the first led to surpass 280lm/mm^2 lumen density. I know the top throwing emitters are in the 230-250 cd/mm^2. The units are different lm/mm^2 and cd/mm^2 but they are very related. So, does the Oslon chip really have 3.2x the lm/mm^2 of cree’s latest?
http://www.cree.com/news-events/news/article/cree-launches-industrys-first-extreme-density-led

Yes it does. High density chips from Cree were never about high luminance. They have a high lumen density in terms of package size. It’s all about putting really big dies on really small packages.

High luminance requaires a very different kind of LED. It needs to have a very low thermal resistance and needs to tolerate a very high current/power density. Effieciency will always be low when you go the the absolute limits.

BTW: there is a rough formula for the luminance based on lumens/mm^2 (area of die, not package). Just multiply the value with pi (only works for de-domed LEds which are basically lambertian emitters).

[Enderman]

@lawallac

So, does the Oslon chip really have 3.2x the lm/mm^2 of cree’s latest?

Yes, but obviously not at the rated current.
You only get 900lm at about 6A which is like 400% the rated current.
The current-flux curve is better for the black flat than for the XD16. This means you get more improvement when you increase the current.
As you can see from the cree datasheet the 284lm/mm^2 is already half way up the curve so there isn’t much extra room for adding current.

[Jinx]

DHL Express notified me I will be getting mine on Monday. Typical, I won’t be there so my better half will discover the purchase :innocent:

[mgorshe95]

What’s the best way to get in contact with Neal?

[Yokiamy]

@Texas_Ace

Here is a list that Neal is working on of the orders so far. He said there are still another ~30 orders he needs to verify and update.

BLF GT balance payment confirm.xlsx - Google Sheets

The yellow highlights are orders he has not received (or not updated yet) the phone number for.

Please check the list for your order if you have any questions.

Is the list in order by people who ordered first?

[BobbyMK]

I know that there is no need for panic but i also don’t see my name on the list.

I am eager to have this thing in my hands. Ive never been this excited for a flashlight.

[djozz]

@BobbyMK

I know that there is no need for panic but i also don’t see my name on the list.

I am eager to have this thing in my hands. Ive never been this excited for a flashlight.

I’m not so much excited, instead I’m a bit scared

[JIGHEADWORM]

@Jinx

DHL Express notified me I will be getting mine on Monday. Typical, I won’t be there so my better half will discover the purchase :innocent:

I didn’t think any had been shipped yet.

[orbitalforest]

Please add me to the list .

[xray291]

hi all

i saw the list neal has of those who paid as well as provided their contact info…i noticed some are saying they got a DHL notification…was that sent out via email? i may need to go check the spam folder again

Thanks

[Biffe-22]

First, I would like to commend everybody involved on the development of such an Outrageous Flashlight.

I already knew I was a Flashoholic (as do all of my Neighbors’ and now the ones across the lake are going to be especially fond of me) well before I came across this site.

Please add me to the list I would like to order Two (2) of these amazing lights including 24 of the 18650 cells to go with this Amazing Beast.

Thanks in advance

[Jinx]

@JIGHEADWORM

@Jinx

DHL Express notified me I will be getting mine on Monday. Typical, I won’t be there so my better half will discover the purchase :innocent:

I didn’t think any had been shipped yet.

I’m not the first, some others already had notifications too.

@xray291

hi all

i saw the list neal has of those who paid as well as provided their contact info…i noticed some are saying they got a DHL notification…was that sent out via email? i may need to go check the spam folder again

Thanks

I got mine via text message.

[Yourrid]

I haven’t received a notification about shipping yet :weary: