Lumintop GT4

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Adhara
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@Texas_Ace: Thanks for background and speculation. If it puts out more lumens and throws at least as far, I’m in, no-brainer!

R

twisted raven
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Imagine 4 CFT90 in this thing. Power draw and cost would be unrealistically high.

4 2mm white flats would be nice as well.

Theodore41
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BlueSwordM wrote:
Well, for one, it will have better QC, replaceable cells, non exaggerated specs, NarsilM.

And where did you find an R90C for 200$US?

The lowest price I’ve found with a coupon is 280$US.


Sure.I’ve got it at $290.00 .
djozz
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twisted raven wrote:
Imagine 4 CFT90 in this thing. Power draw and cost would be unrealistically high.

4 2mm white flats would be nice as well.

CFT90’s would be awesome for the throw but the power draw (and light output) would be a bit less.

mortuus
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I wonder how much the head weighs? it must be alot more then normal gts as it looks quite beefy in the pics. So a runtime on highest should be like 5min atleast or so based on how it looks ?

If it has good runtimes on highest then it can compete with olights and acebeams monster lights then if the price isnt too high also.

...where Frugal meets with Flashlight!

djozz
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It is not extremely chunky inside the head, a lot of volume is converted into finning, but fins have mass also of course, so yes, the head has a bit more volume and will be heavier than the GT. I’m really curious about what the sustainable light level will be actually, large flashlights have an unfavorable volume/surface-area ratio so scaling the power up from a smaller light requires disproportionate measures to create extra surface area (=fins). This is attempted in the GT4 but how the final sustainable output proves to be is a surprise. I hope for over 10K lumen with the head kept under 60 degC. (that will drain the batteries in say 45 minutes, so sustainable is relative Smile )

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Classic lumens/thrower with more emphasis on the lumens (XHP70.2's). The Shocker had C8 size reflectors, looks roughly these are about the same size - Shocker had a smaller head diameter with 3 cups. Of course XHP70.2's can't compete even with a XM-L2 in throw, but maybe are closer when driven harder, and in the stock configuration, should beat a Shocker in throw for sure mainly because of the FET based driver and high amps.

Rockjunkie15
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I can’t wait to see some numbers on this bad boy, and hopefully it has a nice clean pedal free hotspot.

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I think Dale, did a XHP70 mod to the Shocker - would be interesting to see what #'s it got.

Post here: http://budgetlightforum.com/comment/752498#comment-752498, but no throw #'s.

 

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It is about time for extra battery tubes. Those 70.2s will be hungry!

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johny723 wrote:
It is about time for extra battery tubes. Those 70.2s will be hungry!

8×18650 is a plenty of battery power Smile For the GT/GT70 I think it was more of a too much,4×18650 would be good too,but for GT4 8x is enough
lotrbfme
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Interested!

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Texas_Ace wrote:
bluereidon wrote:
Texas_Ace wrote:
Interesting, I was not aware they were announcing these yet.

Yes, the goal is similar throw to the GT70 but ~20k+ lumens.

Not sure how big the market will be but it will be a monster that is for sure.


If it throws the same as GT70 but it’s much brighter I will skip buying GT70 and go straight for this one! Insane!
DavidEF wrote:
mcfarlie6996 wrote:
Agro wrote:
Should easily out throw the original GT

No. Not at all.


You don’t think 7x Boost HX in the 120mm diameter head of a GT would out-throw the original XHP35 HI GT? You may be right. I certainly don’t know. But, care to elaborate? Big Smile

EDIT: Roughly, each Boost HX would get a 40mm diameter reflector opening with very little overlap or a larger diameter with more overlap between them.

Both of these are kinda the same so I will reply together.

In my experience, a multi-emitter light will generally only have slightly less throw vs a single emitter in the same space assuming that the reflector cups are well made of course.

I think XHP35 in GT is at or just under 150 cd/mm². Well cooled white flat is over 300 at peak, a little less in a regular fat host like GT. Boost HX should be even more intense. So… 75% higher LED intensity, 260 cd/mm²?

You would have to lose 43% elsewhere to end up with equal throw. What are the losses elsewhere?
Area loss. Not that high with a siamesed 7-up, especially that you can make the reflector cups very deep.
You may also lose a bit of throw by worse centering.

Am I missing something?

Texas_Ace
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Nope you are not missing anything, your numbers sound good to me but I always under-promise and underestimate when possible.

bluereidon
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Agro wrote:
Texas_Ace wrote:
bluereidon wrote:
Texas_Ace wrote:
Interesting, I was not aware they were announcing these yet.

Yes, the goal is similar throw to the GT70 but ~20k+ lumens.

Not sure how big the market will be but it will be a monster that is for sure.


If it throws the same as GT70 but it’s much brighter I will skip buying GT70 and go straight for this one! Insane!
DavidEF wrote:
mcfarlie6996 wrote:
Agro wrote:
Should easily out throw the original GT

No. Not at all.


You don’t think 7x Boost HX in the 120mm diameter head of a GT would out-throw the original XHP35 HI GT? You may be right. I certainly don’t know. But, care to elaborate? Big Smile

EDIT: Roughly, each Boost HX would get a 40mm diameter reflector opening with very little overlap or a larger diameter with more overlap between them.

Both of these are kinda the same so I will reply together.

In my experience, a multi-emitter light will generally only have slightly less throw vs a single emitter in the same space assuming that the reflector cups are well made of course.

I think XHP35 in GT is at or just under 150 cd/mm². Well cooled white flat is over 300 at peak, a little less in a regular fat host like GT. Boost HX should be even more intense. So… 75% higher LED intensity, 260 cd/mm²?

You would have to lose 43% elsewhere to end up with equal throw. What are the losses elsewhere?
Area loss. Not that high with a siamesed 7-up, especially that you can make the reflector cups very deep.
You may also lose a bit of throw by worse centering.

Am I missing something?

which emitter is the white flat?
Agro
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Osram KW CSLNM1.TG.

bluereidon
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Agro wrote:
Osram KW CSLNM1.TG.

Is it the best for long throw?
DavidEF
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bluereidon wrote:
Agro wrote:
Osram KW CSLNM1.TG.

Is it the best for long throw?

Currently, it is the best. But the Boost HX hasn’t been released yet. Wink

The Cycle of Goodness: “No one prospers without rendering benefit to others”
- The YKK Philosophy

Agro
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This is the farthest throwing LED we’ve seen so far. I believe Boost HX is in mass production and should be better but we’re not able to source them yet.
There may be better LEDs that we haven’t tested.
And there are emitters better than LEDs.

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I can’t wrap my head around the diameter being the same as the GT70, but split into 4 smaller reflectors, AND throwing just as well as one well made GT70 reflector…?
I can see that it may throw insane lumens down range, but at some point wouldn’t it just ‘flare out ‘?
By that I am imagining the 4 beams not being as tightly… collimated? So then at 500 yards the beams disperse….?

I traded GT for GT70 for more lumens downrange, de-domed to reclaim Some throw… but this new one confuses me..

anyone in NE ILLinois into get togethers?

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It’s basically going to have the same throw, but the beam is going to be much wider due to much higher surface area and lumen output.

Because of this, the lumen/candela will be about 4x lower compared to the GT70.

My very own high current Beryllium Copper springs Gen 3:
http://budgetlightforum.com/node/67401
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

Texas_Ace
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justanotherguy wrote:
I can’t wrap my head around the diameter being the same as the GT70, but split into 4 smaller reflectors, AND throwing just as well as one well made GT70 reflector…?
I can see that it may throw insane lumens down range, but at some point wouldn’t it just ‘flare out ‘?
By that I am imagining the 4 beams not being as tightly… collimated? So then at 500 yards the beams disperse….?

I traded GT for GT70 for more lumens downrange, de-domed to reclaim Some throw… but this new one confuses me..

Multi-emitter lights in my testing are generally a bit lower then a single reflector of the same size but not much lower.

The lower throw per emitter is made up for by having more emitters and more raw power.

Just what I have noticed over time. It is not a iron clad rule but has served me well.

Coyotehawk
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Texas_Ace wrote:
Not sure how big the market will be……..

Guaranteed at least 1.

Big Smile
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Maybe they can take the extra ten seconds to make sure the flat of the battery tube lines up with the button this time instead of being a lottery.

Also this reminds me visually of my old Howitzer, which I loved but didn’t have the output you’d expect in such a huge torch today.

Nokoff..still Made in China 山寨主義

Texas_Ace
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nokoff wrote:
Maybe they can take the extra ten seconds to make sure the flat of the battery tube lines up with the button this time instead of being a lottery.

Also this reminds me visually of my old Howitzer, which I loved but didn’t have the output you’d expect in such a huge torch today.

Sadly it is not possible due to the way the machining works. It has been tried many times but it is simply not possible to make it line up without a lot of manual labor to grind each piece individually by hand pretty much.

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Is the intent to do a GB on this light?

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teacher
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KawiBoy1428 wrote:
That’s how you do it, keep it on the low-down, then release it. Outstanding job! Wink Beer Thumbs Up
+1 & Amen… Thumbs Up

You never know how a horse will pull until you hook him up to a heavy load./"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  

      Xlamp size chart _ BatteryU _ Flashaholic? Need Professional Help???            TheOriginal _ TAB _ LightSearch _ BatterySearch _ 14500's _ DiCal 

 

                                             

dyates
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Very nice…

Itsme
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Interested!

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