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

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Texas_Ace
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BVH wrote:
Picked up a new toy…………..indispensable measuring tool today. I’ve been what I call a connoisseur of light for a decade or so now. My sweet spot is 5500K. I’ve just not been able to get into the neutral or warm Whites. There is only 1 incan bulb in my house. Everything else is LED 5000K or 5500K. Now I can precisely measure all of my home, car, searchlight and other lights’ color temps and the REAL CRI, not just the averaged number usually quoted for marketing purposes. I’ve learned quite a bit over the last week while researching my purchase. The typical CRI number we see is the calculated average of 8 colors chosen decades ago by a Body in France, the name escapes me now. It represents how close a light source comes to the spectrum emitted by Tungsten incandescent light. CRI of Tungsten light is 100 on the CRI Scale. Extended CRI adds another 7 colors to the mix and the Sekonic 7000 meter has the capability to measure and display the additional 7 additional colors. The more color samples that are taken, the more accurate your CRI is going to be. But even CRI is a bit outdated and there have been and are processes in-motion to use another standard or two. There’s a lot more to it but i won’t get that deep. Suffice to say that below, the first 2 pics are of readings of the Sun. The first shows the Color temp in Kelvin (Tcp on the meter) of the Sun at 3:15 PM. Don’t pay attention to any of the lux reading as I did not set up for a precise Lux measurement. The next pic shows the CRI RA average calculated on only the first 8 colors in the bar graph but it also shows specific individual CRI readings from all 15 samples. The higher the bar graph and number to the left, the higher the CRI of each of the sample colors and the closer to the Tungsten standard the measured light source is.

The 3rd and 4th pics are of the same type of measurements of the GT on HIGH, not Turbo. The 5th and 6th pics are of the GT on Turbo. Notice how the R9 Red is absent from the GT and is actually a minus number.

Sol at 3:15 PM Dec 12 Text Mode


Thats a great tool you have there! All sorts of fun you can have with that.

I am also glad to see proof that what I have been saying for years is correct, that the sun is around 5000k.

Also good to see proof that the tint does get cooler as the power increases. I think some of those saying it is too warm are looking at it in low modes, where it is quite warm indeed. At full power it really looks much better.

Texas_Ace
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Jerommel wrote:
NikolaS wrote:
Aluminum reflector this size and thickness,is made from single big peace of aluminium block. After CNC machining all leftovers are being recycled..
I doubt that. I assume they get rough casts in reflector shape and then machine it. Otherwise it would be a huge waste of aluminium, time, energy and tools. Sure they recycle the machined off aluminium, but recycling those bits with machine oil and surface oxidation into the same quality alloy is costly too.

They are using a billet to machine the reflectors almost assuredly. The cost to make a mold and cast them would be way more then it is worth for a production run this small. Plus the surface finish would not be as good with a cast material.

From the outside you can see the material quality is much too high for casting.

teacher
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Big Smile . Big Smile

Wasn’t trying to make it sound easy… though it was.

I just did not want to dissamble the head unless I needed to.

More things taken apart, more chance for something to get messed up.

Have not reassembled this one yet, so not sure if I will have to loosen the bezel or not to do it properly. That remains to be seen.

I am thinking go slow & easy……..
………..making sure all is line up properly, it will be NO.

BUT you have done the reassemble Dale…. what says you. Smile

      You never know how a horse will pull until you hook him up to a heavy load. / Paul "Bear" Bryant ~/~\~ "Slow is Smooth, Smooth is Fast"

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DB Custom
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The light is well made Teacher, reassembly with the Bezel still snugged down is painless.

However… I find it more optimum to NOT have the bezel so tight. I also removed some material on the underside of the Delrin centering block, it was cupped underneath and held the reflector a bit too high for my liking (agree with Kawiboy on this). Putting the bezel back on it seems to do well for the definition of the hot spot to not snug it too tightly. [my Delrin block was 2.8mm thick, apart from the centering ring section, and flat across the top both in the block face and across the ring. When I got the base flat the block ended up 2.5mm thick.]

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/\/\/\ … Thank you sir…. Thumbs Up … Good info.

Glad you mentioned the Delrin centering block too. I had forgot what KB had said about that.

      You never know how a horse will pull until you hook him up to a heavy load. / Paul "Bear" Bryant ~/~\~ "Slow is Smooth, Smooth is Fast"

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DB Custom
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The reflector is loose and sort of floats in the head, the centering ring aligns it when the head is tightened down. Wink

teacher
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/\/\/\ . That is what I was thinking / hoping. . Smile

      You never know how a horse will pull until you hook him up to a heavy load. / Paul "Bear" Bryant ~/~\~ "Slow is Smooth, Smooth is Fast"

       Texas Lumens Flashlights  <>   M4D M4X Deals : sign up - save $$$$    ||||

         Rudeness Level /\ mΩ /\ {width:70%} /\ LightWiki /\ LED Tint Chart /\ LED Tint Picture /\ Xlamp size chart /\ BatteryU                   Flashaholic? Need Professional Help???   wink   /\ TheOriginal /\ TAB /\ LightSearch /\ BatterySearch /\ 14500's /\ DiCal                                                       

Qwibbles
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I keep checking back Smile … any idea when they are likely to be sent?

Not sure why this never include the 3rd round of PM’s have not been sent out yet … PEBKAC I expect…

ZozzV6
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I found a picture of my BLF GT on the internet: UghhBig Smile

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Maybe the half of this is yours. The other half is mine. Wink

Nav88
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JasonWW wrote:
I think you would be surprised how quickly the modern CNC machine can carve up a big chunk of aluminum. I’m almost positive it’s quicker and cheaper to do it this way as opposed to using a forge and melting down aluminum then making castings which are going to end up not perfectly round for the lathe to grab ahold of.

Recycling the massive left overs is quite easy. It just gets shipped off. The place doing the machining doesn’t have to deal with it.


A lathe can quite easily grab an out-of-round part and make it round. There may be other technical issues with making the reflector as a machined casting though.

In general I agree that hogging these out of solid rod makes more sense at low quantities. I do hope that they’re saving their sharp tools for nice slow finishing passes. Tool wear could certainly explain the bit of variance in the finishes we’ve seen.

BLFBob
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Trying really hard not to be that guy, but I paid back in December and my name is not on the paid list. I did get an email from Neil asking for my phone number, but that was close to two weeks ago and I haven't heard anything since. I've been trying to keep up with this massive thread to figure out how the shipping thing is supposed to work, but I can't find anything to inform me where in the process my order is.

JasonWW
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BLFBob wrote:

Trying really hard not to be that guy, but I paid back in December and my name is not on the paid list. I did get an email from Neil asking for my phone number, but that was close to two weeks ago and I haven’t heard anything since. I’ve been trying to keep up with this massive thread to figure out how the shipping thing is supposed to work, but I can’t find anything to inform me where in the process my order is.


You are the same as everybody else. We pay our money and just have to wait. 850 orders went in and 500 have currently shipped. As production rolls along at 150 to 200 lights per week, they are steadily shipping them out.

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Convoy L6 thread with XHP70.2, Texas Avenger FET driver, Narsil v1.2 ramping firmware (old), lighted side switch, SMO reflector.

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

Thorfire S70S with MTN FET driver, RampingIOS (D4) and custom lighted side switch.

10 NarsilM user videos for BLF Q8, GT, GT70, GT Mini, Astrolux S43 and ROT66

Texas_Ace BLF Calibrated Lumen tube

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crz6662
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Bruno28 wrote:
I wish it was easier to upload photos here, I did some shots comparing the Niwalker BK-FA09S 2400lm 1490m VS the BLF GT. Is there a way to upload directly instead of uploading to another website then linking here?

It is cumbersome to show your pics here. Always wondered why they insist on file hosting…

Pulsar
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crz6662 wrote:
Bruno28 wrote:
I wish it was easier to upload photos here, I did some shots comparing the Niwalker BK-FA09S 2400lm 1490m VS the BLF GT. Is there a way to upload directly instead of uploading to another website then linking here?

It is cumbersome to show your pics here. Always wondered why they insist on file hosting…


Do you know how much more server space we would need if the site also hosted all of the images posted here?
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Pulsar wrote:
crz6662 wrote:
Bruno28 wrote:
I wish it was easier to upload photos here, I did some shots comparing the Niwalker BK-FA09S 2400lm 1490m VS the BLF GT. Is there a way to upload directly instead of uploading to another website then linking here?

It is cumbersome to show your pics here. Always wondered why they insist on file hosting…


Do you know how much more server space we would need if the site also hosted all of the images posted here?

That makes sense. Can you tell me what FREE site(s) are good to use, if any? I remember searching a few different ones in the past but they all wanted money.

Pulsar
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I use dropbox, but I have not used it to post pics for quite a while.

Franz
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I not received the tracking code yet Crying

DanLdn
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Damn! Been out of the flashlight buying game for a bit and come back to miss this by days!

If there’s any chance I can sneak on to the end of the group buy list (or anyone’s ordered too many!) Please let me know. Dan (London) Cheers…

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Flashem wrote:
Pulsar wrote:
crz6662 wrote:
Bruno28 wrote:
I wish it was easier to upload photos here, I did some shots comparing the Niwalker BK-FA09S 2400lm 1490m VS the BLF GT. Is there a way to upload directly instead of uploading to another website then linking here?

It is cumbersome to show your pics here. Always wondered why they insist on file hosting…


Do you know how much more server space we would need if the site also hosted all of the images posted here?

That makes sense. Can you tell me what FREE site(s) are good to use, if any? I remember searching a few different ones in the past but they all wanted money.

I use IMGUR, per hour parce that works well

BVH
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EggsnBacon wrote:
BVH wrote:
Picked up a new toy…………..indispensable measuring tool today.

Now that is one awesome tool. I hope you know you are now obligated to test and upload results for every light you own lol.

That means I have to break out all the heavy iron from their storage places. That’s a lot of work. But eventually, it will be done. I’m under the impression that typical XBO/Xenon Short Arc lamps have CRI’s in the 90’s. It would be fun to confirm this.

Seriously though, I would be more than happy to measure lots of light sources for people if they send them to me. Send complete lights, bare LED’s, commercial bulbs, whatever you might want measured. I have programmable current limiting power supplies so I can power up bare sources so to speak. Example: LED’s on stars as long as I can get a reasonable sized contact area or u attach wires to it. I can provide Kelvin and CRI/extended CRI measurements and, although I do not quite understand them yet, info on where the source is in relation to:

CIE1976
CIE1931(CIE1964)
XYZ
xyz
u’v’
λp (Peak wavelength)
λd (Dominant wavelength)
Pe (Purity)
PPFD

Maybe a database/repository of sources and their measurements could be kept on the site.

WWII 60" Carbon Arc (Sold), 1.6KW NightSun, 1KW VSS-3A, .8KW TrakkaBeam, 600W M-134 Light, 500W X-500-14s, 500W Starburst, 500W A120b, 450 Watt AEG German Leopard 1 Tank Light, 300W Locators, Megaray, 150W Communicator, Maxabeam Gen3, Pichel 75W Mini-Novas

AlexGT
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Here is a video of how they might make the reflector, probably using more CNC and less human intervention…

Pulsar
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AlexGT wrote:
Here is a video of how they might make the reflector, probably using more CNC and less human intervention…

Thats a pretty cool video on making a reflector, but I really dont think most of the reflectors in the lights we use are made like that. If you notice a page back the pic of the GT reflector, p60, c8 and s2, I would say all 4 of those are turned down on a lathe, not rolled out like in the video.
JasonWW
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The GT’s reflector is NOT made by spinning.

KSGER STM32 2.1S Soldering Station Videos - Review Soon

Convoy L6 thread with XHP70.2, Texas Avenger FET driver, Narsil v1.2 ramping firmware (old), lighted side switch, SMO reflector.

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

Thorfire S70S with MTN FET driver, RampingIOS (D4) and custom lighted side switch.

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mrheosuper
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i want that 2000$ toy so bad Sad

Forgot my pen

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sirking79 wrote:
I think this is a really good article. You make this information interesting and engaging. You give readers a lot to think about and I appreciate that kind of writing.

YOU SIR ARE JUST A SPAMMER!!!

Alux
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Today I illuminated a water tower in 2,08km with the BLF GT Cool

!BLF-GT-distanz.jpg!

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Thanks for sharing Alux.

In Him (Jesus Christ) was life; and the life was the light of men. And the light shineth in darkness; and the darkness comprehended it not.
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Buttkicker wrote:
JasonWW wrote:
In case anyone missed it, I’ll probably repost this every now and then.

I have some news on emitter swaps.

I talked to Richard at Mountain Electronics (RMM on these forums and a sponsor here) and told him there might be more than a few guys with GT’S interested in swapping to a cooler tint. He says that if you send in your stock mcpcb to him and buy one of his new XHP35-HI emitters, he will reflow it for free! He has 2 choices right now, 5,000k and 5700k tint. They are both the same D4 brightness bin as the stock GT 4000k emitter.

The cost of both are under $8, plus the shipping cost there and back. I’m in Texas and shipping a small package from him is usually $2 to $3. So I would estimate the entire cost at under $15.

From his store:

Quote:
BLF GT LED SWAP

​Don’t like the tint of your BLF GT XHP35 HI?  Send us your MCPCB and we’ll swap it for this one. 

Please ship your BLF GT MCPCB to us and we will swap it, test it, clean it, and send it back to you.

Your entire order will not ship until we receive the LED and get it ready to ship.

Ship to:

Mountain Electronics LLC
8076 S. Box Canyon Rd.
West Jordan, UT 84081

Here is the link to the 5000k.

Here is the link to the 5700k.

If your outside of the USA, then I’m not sure what shipping would be or if he even does international shipping. You’d have to contact him for details.

does any one in the UK know any modders dealers that could do the same job of altering the coolness… dont yet have the GT but I much prefer a bluer look

I’ll have to see if I get one (I was just outside of the 1500), but I may try an emitter swap on it too. Ill let you know if it goes okay.

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Franz wrote:
I not received the tracking code yet :((

They don’t provide tracking codes, only in the beginning US buyer got their codes. After that, no codes. Not very professional.  

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