(prototype) the GT Mini

I received the GT Mini and holster today - ordered from Neal August 7, 14 days ago.

Real nice C8 style light!

More compact then the C8 actually, with a wider head and more throw. Illuminated side switch and ramping UI are a real plus for me. Well done Lumintop! :+1:

I believe a 26650 tube would have been just right for this head and would have been closer to the GT big brother proportions?

good to hear patmurris!

about the spring
neal says Driver spring is berylium bronze

Is that CataWomped berylium bronze—- I think that makes it handle more current

Oooh what kind of beryllium copper are they using?

That would explain why the GT Mini can still attain very high lumen numbers without a spring bypass on the driver spring.

One of my GT minis arrived today. It’s really nice! :partying_face:

I quickly opened it to flash ToyKeeper’s Andúril UI onto the driver.

The bezel had a good amount of blue threadlocker, so I used a vise and leather glove to remove it.

The driver came out easily. I dislodged it with a rod fed through one of the MCPCB’s screw holes.

With my light’s switch at 12 o’clock, the screw hole at 4:30 lines up with a blank spot on the driver near the positive wire’s solder connection.

I’m curious if those four holes are in the same place relative to the switch on other samples.

The driver had small traces of white adhesive, but it went back into place snugly.


I received mine today. The head is slightly larger than a C8 with a 42.75 mm interior reflector opening versus 38 mm for the C8. The lighted side switch is alright even with the evil green smile effect.

The best I can get is about 110 kcd but given that it only draws 4.5 amps on turbo I’m not terribly disappointed. One thing I noticed is that it’s not well focused and this could be the reason why the throw doesn’t live up to spec.

The only advantage it has over the D1S is the ability to attach a lanyard (comes with the package). The D1S out throws it and has full output at the top of the ramp.

For the price I’m relatively happy and it will find a good home I’m sure.

Got mine yesterday. Pretty happy with it. My only complaint is that I really lost the indexing lottery, the button is WAY off from the logo, and not even kinda lined up with a flat or a ridge on the handle.

What’s the desire to replace the stock switch? Just for a better feeling click?

To swap the driver.

Is this a NW or CW version?
What battery are you using?

Thanks for the info.

Neutral White with a 30Q. Like I said not terribly disappointed because it takes a FET driver doing about 5.8 amps in a C8 with the same led to best it with a reverse tail clicky which doesn’t behave well with ramping UI.

I might pry off the bezel to see if it can be better focused.

I know the NW reads a bit lower, but I’m wondering why you only got 4.5A out of a 30Q. That’s the same battery I’m using and I got 5.5A.

Does the emitter look off center in the reflector? I was thinking it’s practically impossible for it to be off center due to way the centering ring is made.

No it’s not off center. I haven’t measured the current yet. I was using the current listed in the OP. I will check that and get back.

So your thinking the centering ring is either too high or too low?

I can’t measure the current with ramping, all I get is the double flash on my clamp meter.

Yes, I do believe that the centering ring isn’t the right height for proper focus. From what I’ve learned on here a dedomed led should have a focal point of about one meter like this

Here is the GT mini

On the wall the focal point (where the black center dot disappears) is only a couple of inches with the GT mini.

Feel free to correct me if I’m wrong.

In case your wondering the first pic is a C8 with dedomed XP-G2 S4 2B 2S light that throws 760 meters for the duration of the battery life.

Are you measuring the Throw at the top of the ramp (not Turbo) double click to put it in Turbo —-my NW mine GT is getting 143k pulling 5.7amps —thats on a VTC6

No I’m measuring at turbo. When first trying out the light I measured at the top of the ramp but after reading the included instructions I measured at turbo. The numbers I gave are from turbo.

I was talking about replacing the switch because of failure or breakdown due to normal wear and tear. I believe the stock driver is already good as it is. For most people, there is really no compelling reason to replace the driver. Lumintop made a good business decision in using ATMEL MCU and BLF-inspired FET+1 driver design. Actually, this is the main selling point for me.

swib try different batteries to rule out that atleast. weird one guy gets kcd in the 140 range u in 110… too much difference imo…