BLF GT MINI (Lumintop)

LUMINTOP BLF GT MINI thrower review

Introduction BLF-GT MINI


Do you want massive throw? Do you want o reach 2KM / 1.3Miles? Well, you should look at its bigger brother the BLF GT :--)

This review is about the MINI blf gt. You know.. it's little brother. The GT you can put in your pocket..

It is supposed to throw 135000cd / 135kcd, and that is still quite a lot for such a small flashlight, and is similar to the other mini thrower, the Emisar D1s, which claims the exact same amount of throw, while being a few millimeters longer. So the Emisar D1S still hold the title for smallest, best thrower.

blf gt mini specifications

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Handling of the MINI GT


Do you want a thrower that can fit your pocket? Do you want a thrower that can throw over 100cd? Well, this might be something you will be instersted in.

The size is comparable with the C8 flashlights made by Convoy, Astrolux, Kaidomain etc. It is a little shorter and has a slightly larger reflector.. More on that later.

It is really a mini version of the BLF GT, that actually fits inside your pocket! In the following pictures you can definitely understand the size better, because even on picture it looks larger than in person! The side switch helps, and is probably 1 reason why it is so short. A little twist on the tailcap and you lose connection, so that is an easy lock-out. I really have to get used to such a small thrower. It feels more as a toy than a workhorse to me, but that is really only because of the size. The throw itself is quite specatacular for such a small light! Unprecedented....except for the Emisar D1S.

Flashlight Knurling


The mini GT has some knurling on the body, and non-existent on the tailcap nor the head. Please take a look up close on the following pictures.

Threads print and anodizing.


The anodizing is done very well across the light. The text on the tube is also crisp and clear.

Both o-rings came completely lubed, but the threads were a bit dry.. The tailcap has a double spring in it, as you can see in the picture below.

Lens, bezel and reflector


It is impossible to unscrew the bezel off the body. They must have used glue to stop you from opening up the light... pity. The reflector is smooth, as you could have guessed for a "thrower".

  • Diameter reflector inside 42 mm 
  • Diameter outside head: 50 mm 

The LED is a XPL Hi and is centered really really well, Mine is neutral white!

Dimensions and weight of the BLF-GT:

  • Length: 132 mm  (5.1")
  • Diameter head: 50 mm  (1.9")
  • Diameter battery tube: 25 mm 
  • Weight BLF GT MINI: 150 grams (0.33 pounds)

Below you can see the comparison between a few lights. From left to right: BLF A6, BLF GT MINI, Convoy C8, BLF Q8.

User Interface for the BLF GT MINI


The mini also uses the same Narsil firmware as it's big brother, the BLF GT.

Download the BLF GT manual here:  BLF GT manual

Default UI: ramping

This UI has a smooth ramping between 0% and 80%, while still be able to switch to the 100% Turbo mode.

  • Turn on: single-click, last mode memory (last use level of output)
  • Ramping output level: press and hold
  • Reverse ramping: while ramping in one direction, release button briefly and press + hold again
  • Instant TURBO: double-click
  • Turn off: single-click
  • Ultra-Low mode: from OFF: press the button and release as soon as the GT turns on.
  • Strobe: 1. double-click for TURBO, and 2. double-click again
    (Use single-clicks to cycle forward through the different types of strobes, but you have to be quick: If resting on a strobe longer than 1.2 seconds it locks in and the next single-click is OFF. Press+hold at any time to cycle backwards through the strobes.)
  • Battery status: triple-click (4 blinks, with a short pause, and then 1 blink would indicate 4.1V average per cell, as an example)
  • Electronic lock-out: 4 clicks and to re-enable again 4 clicks.
  • Momentary ON mode: five clicks (loosen and re-tighten the tail-cap to return to normal operation)
  • Factory reset: triple-click (battery status mode), then double-click (driver temperature mode), double-click again (firmware version mode), then press&hold for about 2 s. Four blinks confirm a successful reset.

Alternative UI: Mode-sets

The mini GT is by default using the Smooth Ramping setting. However, the Mini GT can also be operated using a more conventional MODE-SET style user interface. (See next section for details on how to set UI options).
Using the MODE-SET UI the output does not ramp, it steps from one mode to the next using single-clicks, just like with a usual flashlight.

  • Turn on: single-click
  • Next mode: single-click (within 1.2 sec)
  • Previous mode: press + hold
  • Last mode [100%]: from off: press+hold
  • Turn off: single-click (after 1.2 sec)
  • Strobes: press+hold. Single clicks to cycle through all Strobe modes. Press+hold to cycle backwards through the strobe modes.
  • Battery status: from OFF: single-click followed by press+hold. How to read the Voltage: if there are 4 blinks, a short pause, then another 1 blink, it would indicate 4.1 V average per cell.)
  • Electronic lock-out: from OFF: double-click followed by press+hold, same to re-enable again.
  • Factory reset: from OFF, single-click followed by a press+hold (battery status mode), then double-click (driver temperature mode), double-click again (firmware version mode), then press+hold for about 2 seconds. 4 blinks confirm a successful reset.

Backlight of the switch: The backlight of the switch is turned on  by default, when the flashlight is turned off.  If you don't want to use this backlight you can simply turn off that future by quickly switching the power on and off. Unfortunately it will only stay off till next use.
The parasitic drain is ~250 μA with the light turned on, and ~150 μA without.

The button however they used is BLACK, so the backlight is really hard to see! Wonder why that is.

Momentary on:

Yes, hidden. The momentary on only works when you tap 5 times while in the ramping mode. It is not accessible while being in any "mode sets". It seems like you are only able to get out of this mode when doing a complete turn-off, like turning the battery carrier.

PWM


  • Nope... nothing to worry about.

Current Draw


This time I measured it with a Samsung INR18650-25R. First I measured with solid copper core wires, but that somehow gave much lower reading that the supplied Fluke cables! With the Fluke cable I measured:

Max output in Ramping mode: 1.60A

Turbo mode: 3.4A

Lumens

I measured this with my home-built integrating sphere. I used a Convoy S2+ I received from BLF member Djozz as a calibration point, that has a stable output of 137 lumens. Using an Samsung INR18650 25R high drain battery.

Lux measure x Lux total Total Lumen
Lumintop BLF GT Mini Lowest 75 1 75 1,60
Highest 319 100 31900 680,73
Turbo 551 100 55100 1175,81

Max Throw


The throw I measured with the cheap HS1010A lightmeter. In the future I will do more testing with my other lightmeter, which is a more expensive one, but I'm not 100% satisfied with either, because I have desperencies, that I can't explain, so hopefully a 3rd lightmeter would solve the problem.. or make it worse ;--) My  HS1010A is always showing lower numbers. Again, measuring at 5 meters is not the best, but I can do that indoors, I can't measure 10m indoors, so I need to go out again soon and measure all the different flashlights at 10 15 or 20 meters to get more realistic numbers. Until then, here are the numbers.

Measured at 5 meters / 32.8ft:

  • Panasonic NCR18650B Max mode: 246 lux: 61kcd
  • Panasonic NCR18650B Turbo mode: 423 lux: 105kcd 
  • Samsung INR18650-25R  Max mode: 252 lux: 63kcd
  • Samsung INR18650-25R  Turbo mode: 431 lux: 107kcd

Beam shots:


I went out and did some comparison beamshots. Below you can see the BLF GT (XHP35) , Astrolux MF04 (XHP35), Klarus G35 (XHP35),  BLF GT Mini (XPL) and my modded Convoy C8 (XML2). From the place I am standing to the little building is about 400-500 meters. The trees in the back are another 50+ meters.

Conclusion and verdict for the BLF GT MINI

Positive points:

  • Fits in your pocket
  • One of the best smallest throwers, reaching over 100kcd.
  • Simple standard ramping UI...  read cons

Negative points:

  • The programming UI can be complicated.

Marco

Excellent

It does what it needs to do, and it does that very well. A powerful little thrower. It throws farther than 99% of other flashlights with this size. You don't need to mod it, it already throws great! If you don't want to spend $35-$45 on this light, you could always mod something yourself and get about the same output..

Disclosure: The flashlight was provided by NealsGadgets store.

Where to buy BLF GT MINI?

Use the following $5-off coupon code: 1LMGTMINI