Lumintop BLF GT94 ( 4 x SBT90.2, 1.65mcd ) NOW AVAILABLE @ Neals: code NDGT94 gives $ 150 off

An aspheric has far-reaching, more intense hotspot, but will it be as bright as this GT94 over-all?

Btw, l have the aspheric Deft X, and it’s all hotspot, all 700 lumens of it. It’s rated at 1035kcd that time…this GT94 is 1650kcd at several thousand lumens attained by a large hotspot of course.

The FF5 I ordered made it stateside and passed through customs and hopefully makes it here by or before the weekend. I expect it to be close in size to a DEFT X. I don’t have a DEFT X but I do a K40 and a TN32 and several other similar sized lights. But consider the performance difference. The performance of the DEFT X was incredible and still is really. Using light recycling to increase intensity of hand-binned XPG2s it produced like you said, over 1Mcd, all in a narrow beam with 700 Lumens. But the FF5 is going to have a warm beam with 1.2Mlux and 10,0000L. HIDs don’t have the droop like LED lights so heat sinking is less of a consideration compared to heat insulation or rather compartmentalization of the capsule from the electronics and batteries but they have significant considerations. LEDs can happily strobe at ms times at full brightness all day long. HIDs often take over 10s for the beam to fully mature. It’s also not good to turn HID on and off while the capsule components are phase changing. I’ve also noticed that bugs seem to go crazy when you strike up a HID. I am not certain the reason for this but I have always attributed it to the UV and other short wavelengths produced in addition to the thousands of lumens of light and IR. Also a consideration is bulb life, however I will admit that I’ve had many more LEDs die well before the claimed life but no HIDs even on my cars. But I already know that’s going to be the case because LEDs are usually pushed well beyond specifications.

What a time to be alive. My first thrower was the original DEFT around 12 yrs ago and it was mindblowing at 150k lux and maybe 300 lumens. Thrower lights and even most asperics at the time had 80-100klux. I would go up north and blast that thing at a cabins across a bay and see structures light up light alien tractor beam reaching out from the far side of the lake. I can calculate that far less light than that of moonlight was actually getting there. Probably not much need to worry about people freeking out from a twinkling light hitting their window, but we still would limit the Wow throw demonstrations. With these lights now, like the GT lights or the FF5, different story where moonlight is greatly exceeded at theoretical distances of over a mile.

I'm VERY KEEN!!!

Keeping a close eye on this and the GT4 threads - I’d like to see comparison beamshots before deciding, hopefully the discount codes will still work! My current ‘big’ light is a Thrunite TN40S, I love multi-emitter lights for the combination of flood and throw. The GT4 out-throws my ‘thrower’ TN40S by some way, so that might be the one unless the GT94 looks better, such as plenty of flood and crazy throw, or longer turbo times.

Exciting times…

I have the GT4 coming, and not the GT94. For me they are about equally attractive: the GT94 because of the combination of impressive output and impressive throw, the GT4 because of the even more output and the availability of better tint (I will swap leds for better tint than stock), at the expense of throw.
When the GT4 arrives I will know if I made the right choice.

I’m really tempted to jump on the GT4, while M4d M4x’s code still works, but this is a lot of cash for something I don’t actually need! Waiting on VOB’s sample to arrive…

He already posted a review on it, check out his YouTube.

My GT94 showed up today if reports are accurate about a DHL delivery at home. I will know later today.

Not sure if I will get to look at it today or not though.

Without having seen the GT94 yet, I fall into pretty much the same mindset.

I can say that I think you will be very happy with your choice once you swap in the 4000k 80cri LED’s. The CW GT4 is noticeable brighter then my 4000k prototype but I still pull out the prototype most of the time.

I think I am still able to get around 23k lumens with the 4000k 80CRI.




:smiling_imp: guess what it is?

Looks like a beefed up MT09R. Should be interesting depending on how it was designed. They could either get it right or very wrong.

I see it having a big issue with heat and it is in another class vs the GT94 seeing as it looks to be around a ~90mm head vs 120mm.

Sorry, I meant his review of the GT94!

Yeah I’m waiting for that as well to see how big of a difference there is.

See freeme’s post!

No-one else is biting - no idea! The knurling looks Catapult V6-like, that’s all I can say. Put us out of our misery!

It’s a Haikelite. I stay away from those.

Ok, just took a little time to do some quick measurements and look at the technical aspects of the GT94. VOB will be making a video review with beamshots and all that good stuff when he gets his light and has some time (have confirmed he has one coming).

This time my light got a little scratched up in shipping, seems someone is shipping the sample lights a bit differntly then the production units lol. Thinking about recommending that they attach the handle in shipping and use the foam to hold it in place in the box.

Overall everything looks fine on my sample.

Calibration is correct on mine.

The bathroom lumen test (won’t fit in my sphere) shows something around ~18-20k lumens depending on what calibration I use (needless to say it is not a precise measurement).

This falls in line with what I was expecting though and shows they are being driven very well, should be around ~30A of current at that output aka ~450w like the normal GT4.

For throw I got 1.4Mcd or 2,375M of throw.

This light has about 1/3 less lumens but gains 3x the throw vs the GT4.

It should be noted that this measurement is far from ideal as humidity is high and my throw measurements are almost always lower then others. This was also after the output tests and using HG2 cells vs VTC6. Longer range for the test would also improve numbers I am guessing. So I would not be surprised to see 1.5-1.6Mcd from others tests.

VOB has a light coming as well and it will be interesting to compare numbers, I always tend to round my numbers down so they are generally worst case numbers, I leave best case numbers to others lol.

The tint is good for a CW light, in the low modes before the main channel kicks in there is a green hue like the SBT90.2 is known for but as soon as the main channel kicks in it turns into a really nice bright white. I personally prefer NW or WW but I could live with this CW, which is high praise from me lol.

I then ran a thermal test by setting it on it’s side (like it would be used in the real world), in a room with ambient air around 27c. No airflow to speak of. Disabled the thermal stepdown and set it to turbo and let it run.

It started out at 30C and after 4 mins it was at:

60c hottest point in fins
50c at button
40c battery tube
33c handle

at 8 mins it was at:

76c hottest point in fins
68c at button
60c battery tube tapering to 50c
37c handle

at 12 mins it was at

87c hottest point in fins
77c at button
71c battery tube tapering to 61c
39c handle

Notice a trend yet? The even tempreture rise shows it has a good thermal path.

at 16 mins it was at

93c hottest point in fins
85c at button
77c battery tube tapering to 68c
45c handle

LVP kicked in at 17 mins (cells were already used some for earlier tests) with basically the same temps. The cells when pulled out were around 75c, VTC6 are rated for 80C, so just within spec.

I then hot swapped to a fresh set of cells to see what would happen if it got a bit hotter and let it get up to 105C before shutting it down.

During the ~1 min that it took me to swap carriers the light cooled down to ~83c to give an idea of hot much heat it was shedding even without airflow.

The light still works fine and no damage. I let everything cool down, recharged the cells and tested output again and actually got slightly higher numbers (slightly higher voltage cells most likely).

So basically the same thermal performance as the normal GT4, confirms they are using about the same amount of power.

The light will handle disabling the thermal protection but it is not recommended to run it until LVP except in an emergency / testing situation. The cells while still in spec if you are using VTC6 are pretty close to the limit and could be past the limit on lower quality cells.

So apply common sense if you disable the thermal control.

If you leave it at the top of the ramp instead of turbo you should easily be able to handle that power level until LVP with much lower temps and double the battery life or more due to less voltage sag etc.

Impressive!

My Giggles prototype family:

I forgot to include the chuckles side of the family, the mini and micro lol.

[quote] This light has about 1/3 less lumens but gains 3x the throw vs the GT4. [/quote] I am visualizing the beam performance and the beam profile, and I like what I see, and I think that only this light has both this much throw and this much power. There are other lights nearby in the flashlight universe, but they are either significantly less power or significantly less throw. Nothing against them, I have them, I like them, but I don't have this one.

This light is currently the first and only offering in the sixth class of 90.2 flashlights: SBT90.2 emitter, multiple emitter, size of reflector = large.

I have SBT90.2, single emitter, small, medium and large reflector classes filled. All good there.

SBT90.2, multiple emitter, medium size, this class was recently announced in another thread on this forum.

SBT 90.2, multiple emitter, small size: I will have to wait for someone to put this class of flashlight forth.

This light, multiple 90.2, large size, is currently a must have to achieve completion of the six classes of 90.2 flashlights.