Lumintop GT micro

ToyKeeper · 2019-02-25T22:00:44.000Z

It’s a nice form factor. Small, comfortable, generally sleek. It’s physically pretty similar to a popular Maglite model, and that model was popular for a reason.

Looking back at the X5 though, the #1 request was that people wanted it to use an 18650 cell, to increase power and runtime. The head is wide enough that the wider cell would probably be a nice fit.

On a related note, one of the top feedback items on the D1S (and the GT-Mini) was that it should have maybe used a 21700 cell, for similar reasons.

Texas_Ace · 2019-02-25T22:42:32.000Z

Yes, I like the idea of 21700 based lights as well, sadly they did not heed my suggestion that the GT mini should be made into a 21700 light.

I think it would of been a great combo.

I really like the Sofrin C8F? that is 21700 based.

80T · 2019-03-03T02:00:01.000Z

+1 on the GT Mini 21700 (and maybe an XHP35 HI as well)

Also +1 on the Sofirn C8F which seems so far to be my all around go to - it has pretty much of everything - enough throw, plenty bright, enough spill, good ramping UI, mechanical forward clicky so no parasite drain.. If only it would've been a single emitter (with the efficacy of the 3 it currently has tho) like a C8/GT Mini and with a more refined beam pattern..

DB_Custom · 2019-03-03T17:05:22.000Z

The Swiss Army Knife conundrum, having everything everybody wants all the time… due to the very nature of a flashlight, someone is guaranteed to be disappointed no matter how epic a light is made. Hence, the reason some of us have so many.

JasonWW · 2019-03-06T04:34:46.000Z

Tom E:

DB Custom:

Question, what does “NarsilM v1.3 adapted by Texas Ace” mean, exactly…. And the 2.5A Turbo, why 2.5A? The emitter can take over 6A… Really need the answer to both of those questions…

The Lumintop GT Mini, hhhmmm, thought it’s using NarsilM but no mention of it? Why?

I agree — I’d like an explanation of the 2.5A turbo as well.

I don’t know if anybody has actually answered this yet, but the 2.5 amp that was mentioned in the early version of the GT manual was just a misprint. It was copied and pasted from the original GT manual. It can be disregarded.

Apparently Lumintop is still inadvertently using that 2.5 amp rating for the Micro. :person_facepalming:

JasonWW · 2019-03-17T16:00:08.000Z

I recieved a Micro from Neal today. It’s pretty cute and pocket friendly. I’ll do a quick review of it.

The quality is just as good as the Mini, just smaller. I have the Cool White version.

Unfortunately I only had a protected Evva 800mah 14500 non-high drain battery in my stash.

I did some tail cap amp draws using the UT210E clamp meter.

Top of ramp - 1.65A
Turbo at 3 secs - 2.75

Turbo amperage dropped fast due to this battery. I thought about buying a Windyfire and wait till it gets in to report my findings, but I decided to rip the protection circuitry off instead to see what happens. There was only a small increase in output.

Unprotected Evva 800mah

Top of ramp - 1.80A
Turbo at 3 secs - 2.90
Turbo at 30 secs - 2.40

I used my Maukka calibrated TA Lumen Tube to measure the output.

Top of ramp - 470 lm
Turbo at 3 secs - 770 lm
Turbo at 30 secs - 690 lm

To measure throw I use my LX1330B lux meter at 10 meters.

At 10 seconds I got 53Kcd or 460 meters.
At 30 seconds the output dropped to 46Kcd or 429 meters.

Not bad for a tiny light running on a not so great battery. I want to order a high drain cell to see what it can really do.

Parasitic drain was lower than the Mini at 140 microamps with the switch light on and 0.3 microamps with the switch light off. The Mini was 180/20. Did anyone else get a super low drain for the switch light being off? That’s crazy low drain.

A few pics with the Mini:

The rubber button is just a tiny bit smaller on the Micro.

It’s surprising just how small it is compared to the Mini. It makes my hand look giant. Lol

EDIT:

I recieved my high drain Windyfire 650mah button top battery. Here are the updated numbers.

Tail cap amp draws using the UT210E clamp meter.

Top of ramp - 2.2A
Turbo at 3 secs - 4.6A
Turbo at 30 secs - 4.1A

Maukka calibrated TA Lumen Tube to measure the output.

Top of ramp - 650 lm
Turbo at 1 secs - 1100 lm
Turbo at 30 secs - 970 lm

To measure throw I use my LX1330B lux meter at 10 meters.

At 10 seconds I got 63Kcd or 502 meters.
At 30 seconds the output dropped to 60Kcd or 490 meters.

M4D_M4X · 2019-03-06T08:04:37.000Z

thanks for sharing!

SKV89 · 2019-03-06T08:31:58.000Z

Thanks Jason for the valuable data. Now we just need to see how it performs with the White Flat. 100kcd would be real nice for the size.

mortuus · 2019-03-06T08:43:34.000Z

looks very small or jason has gigantic hands lol, but i hope now they will go even smaller, the gt nano like half the size or smaller of the gt micro that would be fun hope it can be done.

Schoki · 2019-03-06T10:37:03.000Z

JasonWW:

… 0.3 microamps with the switch light off…

That seems way too low. It uses the well-known FET+1 Avenger design with Narsil. 20uA are recommended there to charge the sample-and-hold capacitor inside the ATTiny to a reasonable level. It could be that they used a different resistor combination to get that low drain, someone with a production light would have to check that.

teacher · 2019-03-06T12:52:24.000Z

Excellent review, pictures, & info Jason, thank you!!

LouieAtienza · 2019-03-06T20:25:43.000Z

Great reviews… waiting anxiously for mine!

saypat · 2019-03-06T20:51:57.000Z

Jason, how long was the shipping ? Thank you.

JasonWW · 2019-03-06T21:12:20.000Z

saypat:

Jason, how long was the shipping ? Thank you.

I think Neal spent some extra money on shipping so I would get it fast and post up what I think about it. It took 8 days. Regular shipping will probably take 2 weeks or so to the US. That’s what it typically takes (outside of the busy holiday season).

DB_Custom · 2019-03-06T21:55:54.000Z

I ordered fron Neal 11 days ago, paid full price with no discount for two lights, also paid $10 expedited shipping. No word, of course, on when the may show up…

M4D_M4X · 2019-03-06T22:58:22.000Z

you can send him a mail on Neal@m4dm4x.com
maybe that catches his attention...

JasonWW · 2019-03-06T23:50:00.000Z

Have they started shipping them yet?

I had to quickly read this thread to get familiar with the light so I may have missed important stuff about the release date, shipping schedule, etc…

BlueSwordM · 2019-03-07T00:02:56.000Z

@JasonWW, I’m personally getting 179uA on standby, and 15,96uA with switch LED off.

Your reading is insanely low. Probably the lowest of all e-switch lights.

JasonWW · 2019-03-07T01:15:37.000Z

BlueSwordM:

@JasonWW, I’m personally getting 179uA on standby, and 15,96uA with switch LED off.

Your reading is insanely low. Probably the lowest of all e-switch lights.

I don’t know, maybe my DMM is not good at measuring super low amperage?

I’ve got 2 of the Boruit D10 headlamps which have e-switch drivers. One measured 0.3 microamps and the other 0.6 microamps.
My GT mini measure 20 microamps with the led off.
My Sofirn Q8 measured 22 microamps with the led off.
My S43S measured 24 microamps with led off.
So I would expect the Micro to be in that same 20-30 microamps range.

I’ve got 2 VC97+ DMM (cheap), mine has some nice Probe Master test leads (cost more than double the meter). The other has the cheap stock leads. Both meters measure the same 0.3 microamps. IDK ¯\/¯

I’ll try and borrow a 3rd meter to see what it says.

I do want to point out something kind of unusual in the way that my Micro behaves. If I use the shortcut to turn off the switch light and then disconnect power then reconnect power, the switch light will stay off and the light does not give the usual two blinks.

If the switch light is on and I cut battery power then reconnect power I get the normal two blinks.

Usually removing battery power resets the light. I can only guess that there is a capacitor that is supplying power to the driver in it’s sleep state so that it doesn’t even notice the battery was disconnected. None of my other Narsil base lights do this. Just kind of odd and I thought I would share.

DB_Custom · 2019-03-07T17:08:02.000Z

Jason, you’re a comparatively short drive from IMRbatteries, they have whatever you need. Giving a review on a prototype light with a lesser cell misleads everyone, can actually cost sales because your numbers are low. Just saying…

I say “comparatively short” because a drive across Houston TX can be he equivalent of driving out of state for a lot of people. lol Even so, ordering from them should net results next day or possibly 2 days since you’re in the same city.