[PART 2] Official BLF GT Group Buy thread. Closed, but Public sales open!

[JasonWW]

@Dustynell

Hello, who can assist me with my getting my BLF GT? there was an issue with sending my original address and I have providing an alternate address, so still waiting as of this message.

I see you were #271 on the list. Did you make the deposit?

There was a final payment deadline of Dec 30, if I recall correctly. Did you get a personal message with the payment instructions? Did you pay, but had an issue with the shipping address?

[Dustynell]

Yes and yes. Completed the deposit and final payment in a timely manner.

There was an issue with shipping g to my original address and I provided an alternate address.

[JasonWW]

@Dustynell

Yes and yes. Completed the deposit and final payment in a timely manner.

There was an issue with shipping g to my original address and I provided an alternate address.

Did you fill out the most recent BLF GT outstanding issues survey

I would do that. Hopefully Lumintop is taking over this survey.

Then I would get into contact with Lumintop (Marketing.Lumintop@gmail.com) and explain that you were #271, made you deposit, made your final payment, but there was an issue with your address and that the whole thing seemed to slip through the cracks.

You can also send Neal a personal message just in case he is able to help out, but I think Lumintop are handling issues like this.

[ChibiM]

@Texas_Ace

Suddenly lumintop got in contact with me and let me know they are officially moving forward with The XHP70.2 GT after over a year of trying to talk them into it. I am guessing the XHP70.2 GT’s that sold on ebay for $495 played a large role in the sudden interest. Thanks to whoever bought those for getting this ball moving! They nearly lost money on the last GT group buy, they only turned a profit with the last few hundred sells and it scared them. To put peoples minds at ease, the group buy price on the light will be much less then $500, still working on the exact pricing but I am trying to get them as low as possible. It will also be much smoother then time around. Still got details to work out before I start a thread for it but it is in the works officially now. They are saying 2 months since most of the parts are re-used from the GT. Based on the GT GB, I figure 3+ months is a good guess but would love to be proven wrong lol. Going forward on the group buys that I run I am hoping to keep them to a start to finish timeline of ~3 months. I can’t do another year long life eating group buy. 80 hour weeks are no fun. Plus I really feel bad for all the people that had to wait months and months for the lights, it was not fair to them. Lastly lumintop ALSO suddenly showed interest in another project I have been pitching them for almost a year now as well. It would be the biggest and most expensive BLF light so far by a fair margin but boy, would it be a light like nothing else on the market… :innocent: :cowboy_hat_face: I have been telling them, if they build it, they will come but it seems they needed some evidence of that.

ooohhhhhh nice nice! waiting for more info :D

But it should beat the Acebeam X70 by a fair margain :D

[Texas_Ace]

@ChibiM

ooohhhhhh nice nice! waiting for more info :D 

But it should beat the Acebeam X70 by a fair margain

:innocent: :innocent: :innocent:

[blinker]

What is the difference between the 70.2 and the current GT? Is it more lumens, more throw? Anything else?

[djozz]

@blinker

What is the difference between the 70.2 and the current GT? Is it more lumens, more throw? Anything else?

4 times the lumens, 40% less throw.

So your hotspot is (a bit) less intense but clearly bigger, spill is much brighter.

[blinker]

Thanks djozz. Do you think there is a way to get more throw? By the way, I like your quote by G. Speth.

[JasonWW]

@blinker

Do you think there is a way to get more throw?

Sure, slice the dome.
With the dome on you get about a –45- 40 reduction in throw (2200m 2000 to 1200m)
With a sliced dome you get about a –27- 20 reduction in throw (2200m 2000 to 1600m)
This is based on Texas_Ace’s GT. You lose about 15% lumens by slicing the dome, which isn’t too bad.

Hopefully I remembered all these numbers correctly.

[mmalive]

@djozz

@blinker

What is the difference between the 70.2 and the current GT? Is it more lumens, more throw? Anything else?

4 times the lumens, 40% less throw.

So your hotspot is (a bit) less intense but clearly bigger, spill is much brighter.

How is pricing for new version? As opposed to upgrading? If price is good then better off buying new version to have BOTH thrower and spotter versions.

[blinker]

@JasonWW

@blinker

Do you think there is a way to get more throw?

Sure, slice the dome.
Dome on you get about a 45% reduction in throw (2200m to 1200m)
Sliced dome you get about a 27% reduction in throw (2200m to 1600m)
This is based on Texas_Ace’s GT. You lose about 15% lumens by slicing the dome, which isn’t too bad.

Hopefully I remembered all these numbers correctly.

Okay, if a dome (I assume it comes with a dome) reduces it by 45% and no dome reduces it by 27% how do you get 0% reduction?

[djozz]

@blinker

@JasonWW

@blinker

Do you think there is a way to get more throw?

Sure, slice the dome.
Dome on you get about a 45% reduction in throw (2200m to 1200m)
Sliced dome you get about a 27% reduction in throw (2200m to 1600m)
This is based on Texas_Ace’s GT. You lose about 15% lumens by slicing the dome, which isn’t too bad.

Hopefully I remembered all these numbers correctly.

Okay, if a dome (I assume it comes with a dome) reduces it by 45% and no dome reduces it by 27% how do you get 0% reduction?

You only get 0% reduction by using a led that has a die with the same luminus intensity as the XHP35 Hi. These leds exist (XP-L Hi, dedomed XP-G2, and Oslon Black Flat have even higher luminus intensity and should throw further) but have usually smaller dies so you loose output instead of gaining it. There is currently one led that gives the same throw combined with higher output, the Luminus CFT90, but it is not very efficient, it is a 3V led so it needs a new driver, it needs some modding get it fit and centered, and perhaps most significant it is a really expensive led, like over 100 dollar.

[JasonWW]

@blinker

@JasonWW

@blinker

Do you think there is a way to get more throw?

Sure, slice the dome.
Dome on you get about a 45% reduction in throw (2200m to 1200m)
Sliced dome you get about a 27% reduction in throw (2200m to 1600m)
This is based on Texas_Ace’s GT. You lose about 15% lumens by slicing the dome, which isn’t too bad.

Hopefully I remembered all these numbers correctly.

Okay, if a dome (I assume it comes with a dome) reduces it by 45% and no dome reduces it by 27% how do you get 0% reduction?

Let me correct the throw distance I used before. I thought it was 2200m, but it looks like it’s 2000m. So going from xhp35-HI to a hard driven stock 70.2 is a 40% throw reduction. The sliced dome has a 20% throw reduction.

Anyway, a larger diameter emitter is almost always going to decrease throw because it’s hot spot is larger. The xhp35-HI emitter die is about 5.5 square millimeters. The xhp70.2 die (dome on) appears to be about 22 square millimeters due to the roughly 40% magnification effect of the dome. (I think it’s 40% to 50%). Anyway, that’s a huge increase in emitter size.

Slicing the dome off makes the die about 15.7 square millimeters. That’s still 3 times bigger than the xhp35-HI.

On the other hand, a larger emitter can usually be brighter which then gives you back a lot of the throw distance you lost.

With the sliced dome 70.2 emitter doing 6,000 lumen instead of 2,000 lumen, the net result is a small 20% loss in throw.

You could go with a smaller emitter to get more throw than stock, but it’s a pretty small hotspot and was voted down during the GT design phase.

If you want more than 2000m throw along with a bigger and brighter hotspot, the CFT90 is the hot ticket. When pushed really hard, it can give about 2450m throw and 4500 to 5000 lumen (according to Skylumen). So the hotspot is a little bigger, it’s much brighter and the throw is increased. Sounds great! What’s the catch? They cost about $675.

The bottom line is a lot of folks don’t really need to see 2000 meters (1.2 miles). You can make the GT more practical with a 70.2. It doesn’t cost much more and it can still throw a long way, plus you get a much bigger hotspot to better see what your looking at.

BTW, all xhp50, 50.2, xhp70, 70.2 emitters have domes.

[Texas_Ace]

@JasonWW

@blinker

Do you think there is a way to get more throw?

Sure, slice the dome.
With the dome on you get about a –45- 40 reduction in throw (2200m 2000 to 1200m)
With a sliced dome you get about a –27- 20 reduction in throw (2200m 2000 to 1600m)
This is based on Texas_Ace’s GT. You lose about 15% lumens by slicing the dome, which isn’t too bad.

Hopefully I remembered all these numbers correctly.

Keep in mind that VOB’s numbers were a fair amount higher then mine. He was using a P2 bin emitter vs my 4000k 80cri. So it is possible we are both correct. Since he has before/after numbers it is hard to argue the relative performance gains of his numbers.

[mmalive]

@JasonWW

@blinker

@JasonWW

@blinker

Do you think there is a way to get more throw?

Sure, slice the dome.
Dome on you get about a 45% reduction in throw (2200m to 1200m)
Sliced dome you get about a 27% reduction in throw (2200m to 1600m)
This is based on Texas_Ace’s GT. You lose about 15% lumens by slicing the dome, which isn’t too bad.

Hopefully I remembered all these numbers correctly.

Okay, if a dome (I assume it comes with a dome) reduces it by 45% and no dome reduces it by 27% how do you get 0% reduction?

Let me correct the throw distance I used before. I thought it was 2200m, but it looks like it’s 2000m. So going from xhp35-HI to a hard driven stock 70.2 is a 40% throw reduction. The sliced dome has a 20% throw reduction.

Anyway, a larger diameter emitter is almost always going to decrease throw because it’s hot spot is larger. The xhp35-HI emitter die is about 5.5 square millimeters. The xhp70.2 die (dome on) appears to be about 22 square millimeters due to the roughly 40% magnification effect of the dome. (I think it’s 40% to 50%). Anyway, that’s a huge increase in emitter size.

Slicing the dome off makes the die about 15.7 square millimeters. That’s still 3 times bigger than the xhp35-HI.

On the other hand, a larger emitter can usually be brighter which then gives you back a lot of the throw distance you lost.

With the sliced dome 70.2 emitter doing 6,000 lumen instead of 2,000 lumen, the net result is a small 20% loss in throw.

You could go with a smaller emitter to get more throw than stock, but it’s a pretty small hotspot and was voted down during the GT design phase.

If you want more than 2000m throw along with a bigger and brighter hotspot, the CFT90 is the hot ticket. When pushed really hard, it can give about 2450m throw and 4500 to 5000 lumen (according to Skylumen). So the hotspot is a little bigger, it’s much brighter and the throw is increased. Sounds great! What’s the catch? They cost about $675.

The bottom line is a lot of folks don’t really need to see 2000 meters (1.2 miles). You can make the GT more practical with a 70.2. It doesn’t cost much more and it can still throw a long way, plus you get a much bigger hotspot to better see what your looking at.

BTW, all xhp50, 50.2, xhp70, 70.2 emitters have domes.

So what would be price range of group buy as opposed to original group buy price? Reason is if more cost effective to MOD or buy newer version?

[No-2-Ageing]

@mmalive

@JasonWW

@blinker

@JasonWW

@blinker

Do you think there is a way to get more throw?

Sure, slice the dome.
Dome on you get about a 45% reduction in throw (2200m to 1200m)
Sliced dome you get about a 27% reduction in throw (2200m to 1600m)
This is based on Texas_Ace’s GT. You lose about 15% lumens by slicing the dome, which isn’t too bad.

Hopefully I remembered all these numbers correctly.

Okay, if a dome (I assume it comes with a dome) reduces it by 45% and no dome reduces it by 27% how do you get 0% reduction?

Let me correct the throw distance I used before. I thought it was 2200m, but it looks like it’s 2000m. So going from xhp35-HI to a hard driven stock 70.2 is a 40% throw reduction. The sliced dome has a 20% throw reduction.

Anyway, a larger diameter emitter is almost always going to decrease throw because it’s hot spot is larger. The xhp35-HI emitter die is about 5.5 square millimeters. The xhp70.2 die (dome on) appears to be about 22 square millimeters due to the roughly 40% magnification effect of the dome. (I think it’s 40% to 50%). Anyway, that’s a huge increase in emitter size.

Slicing the dome off makes the die about 15.7 square millimeters. That’s still 3 times bigger than the xhp35-HI.

On the other hand, a larger emitter can usually be brighter which then gives you back a lot of the throw distance you lost.

With the sliced dome 70.2 emitter doing 6,000 lumen instead of 2,000 lumen, the net result is a small 20% loss in throw.

You could go with a smaller emitter to get more throw than stock, but it’s a pretty small hotspot and was voted down during the GT design phase.

If you want more than 2000m throw along with a bigger and brighter hotspot, the CFT90 is the hot ticket. When pushed really hard, it can give about 2450m throw and 4500 to 5000 lumen (according to Skylumen). So the hotspot is a little bigger, it’s much brighter and the throw is increased. Sounds great! What’s the catch? They cost about $675.

The bottom line is a lot of folks don’t really need to see 2000 meters (1.2 miles). You can make the GT more practical with a 70.2. It doesn’t cost much more and it can still throw a long way, plus you get a much bigger hotspot to better see what your looking at.

BTW, all xhp50, 50.2, xhp70, 70.2 emitters have domes.

So what would be price range of group buy as opposed to original group buy price? Reason is if more cost effective to MOD or buy newer version?

N.B. What counts for max throw is for the emitter to have max lumens per mm^2.

[zelee]

finally i can open my blf gt head, and damn that was a tough bastard to open :smiling_imp:
will contact neal for replacement

[JasonWW]

Let me know if you are not on this list and still have an issue.

If your issue has been resolved, let me know and I’ll remove you from the list.

See post #1 for the Issues List.

This might be the new contact email for GT issues.
Marketing.Lumintop@gmail.com

Bags and caps are still handled through Neal.

[JasonWW]

@zelee

finally i can open my blf gt head, and damn that was a tough bastard to open :smiling_imp:
will contact neal for replacement

I added you to my list. Also make sure to contact Lumintop using the email under the list since I think they are now handling these issues.

[zelee]

@JasonWW

@zelee

finally i can open my blf gt head, and damn that was a tough bastard to open :smiling_imp:
will contact neal for replacement

I added you to my list. Also make sure to contact Lumintop using the email under the list since I think they are now handling these issues.

thanks for the info