[Review] Convoy L6 diode GT-FC40 90CRI

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Mocarny
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[Review] Convoy L6 diode GT-FC40 90CRI
Convoy L6 diode GT-FC40 90CRI



At the end there will be a summary for those who like only particulars. In each topic I will bold the key sentences, so it will be easier to notice what's the most important. Enjoy!

For VERY large photos: click -> on the photo page right click -> "Open image in new tab"

I've got this flashlight from Convoy's owner- Simon - its's an experimental version, although Simon said it  will be mass produced
Official Convoy's online store: http://convoy.aliexpress.com/store/330416

Webside with flashilght:
https://www.aliexpress.com/item/1005002 ... 2540.pic_2

Table of Contents:

General parameters
- Package content
- Appearance, parameters
- UI, runtime and charging
- PWM
- Waterproofness
- Light pattern, tint
- Beamshots
- Usage and my experiences
- Gallery and Summary

 



General Parameters


LED: GT-FC40, 12V, 5000K - 5500K 90CRI (it's amazing)

Reflector: OP or SMO, maximum diameter 67.8mm, height 48.2mm

Brightness: measured max 3415 lumens

Modes: 3 modes, 226lm - 1250lm - 3450lm (only my version has 3 modes, the version for sale has 4: 1% - 10% - 40% - 100% + strobe after double click)

Control: Forward type switch on the back of the flashlight, on the cap, changing of modes with the side button on the head

Waterproof: IPX6

Battery Power: 2 x 26650 cells, not included

Head diameter: 75mm

Outer diameter of battery tube: 35mm

Inner diameter of the battery tube: 27mm (fat one)!

Flashlight length: 255mm

Weight: 550g



Package content


In the thick cardboard box was only a well secured flashlight + tactical ring. Everything well protected with sponges.


Appearance, parameters

 

For those who had the L6, the flashlight does not need special introduction - it is the same decent L6, only with a new LED.

 

For those who do not know L6:

 

Generally speaking, this is a large and durable flashlight, with a height of 25.5cm, head diameter of 74mm and weight including cells of 745g ...not suitable as EDC Silly



 

Beginning with the head:

 

Tactical head bezel, aluminumAR violet coated lens



- Reflector OP, also possible SMO




- GT-FC40 12V LED, the tint in my unit is cool white, about 5000K-5500K. More about it in the section Light pattern, tint


- Head with substantial fins, really does the job. On the side, the button to change modes (on/off button on the back). It is not illuminated.


- The driver does not have a bypassed spring, unlike the spring in the tail cap.


- The cell tube is long and knurled, which gives a firm grip - people with large hands will like this flashlight.


Unfortunately the batteries inside are bumping into the tube walls. As I checked, it can be eliminated by using stronger spring,

- The kit comes with a metal tactical ring screwed in front of the tail cap. Thanks to it the flashlight does not roll off the table so easily, you can hold it in rather inconvenient way, and most of all it adds +3 to tactical look



- The tail cap is equipped with eyelets for a lanyard, and a forward switch - momentary lightning when pressed halfway, continuous lightning after an audible click. Less popular than the reverse switch, but good for temporary lighting.



UI, runtime and charging


UI
The current driver has 3 modes: 226lm - 1250lm - 3415lm. You turn on the flashlight from the back, and change modes with the button on the head. There are no flashing modes, only 3 modes.


NOTE: only my pre-sale version has 3 modes, the target and general version has 4 modes + strobe when double-clicked. The modes are 1% - 10% - 40% - 100%


Runtime
I will soon add a graph showing changing of btightness, now I have the temperatures, and also the brightness at minute 10.
Temperatures:
at 2 min: 40°C
in the 5th minute: 43,5°C
in 10th minute: 47°C
brightness in 10th minute: 1657lm


Charging
There is no built-in charging, so you will need to arm yourself with a separate charger, preferably with 2 slots.


PWM



Yes, PWM is visible with the camera, but not observed with the naked eye.


Waterproofness



Declared IPX6, so resistance to all kinds of rain, but does not have immersion resistance under water


Light pattern, tint



GT-FC40 12V LED, 5000K-5500K, 90CRI with max brightness measured by me 3415lm. I found such tests, it seems that those are the same diodes, but I'm not sure: https://budgetlightforum.com/node/68899
If so, the diode has even 94CRI








I would definitely recommend the OP reflector version!

You can certainly see that the color is cool, closer to 5500K than 5000K



Despite the large size of the diode itself, you get quite a bit of focus when combined with this flashlight and reflector. I would like to see this diode in smaller flashlights.


Beamshots



ISO200, t2s, f/3.5 sunlight white balance

Picture how the forest looks:



Pictures of L6 GT-FC40:





3 modes are completely sufficient, if you take into account that this is a big flashlight, and as you know, big flashlights are supposed to shine brightly, without playing with some moonlights and other such stuff.

 

Now I invite you to the clash of giants: 4X18A in the left corner versus L6 in the right corner, heavy weight:





I prefer the GT-FC40 in the L6, well, what can I do. I simply prefer it. I'm not a fan of cold tints, but this one is such a clean, low blue, no tint shift that I'm leaning towards it.



Usage and my experiences



Please note, the flashlight is not suitable for placing on a desk! Once when I wanted to turn on the lamp, I bumped it, and it flipped onto the computer pad, which fell on the floor. You know, it might have broke.
From my other findings: the flashlight is well balanced, the center of gravity is right where you hold it, which makes it easier to walk with - that's significant considering it weighs 745 grams.
If I worked as a security guard, watchman, janitor, etc, I would definitely take it with me. Because of the weight and dimensions, a good flashlight for more stationary tasks. Also good to put on a shelf with your collection.
...
A few days have passed, I've been using it even longer and I took it into the woods again and I'll tell you this: this flashlight rocks! The concentrated light beam pierced the forest. Powerful!

 




Gallery

 




Summary

 

The Convoy L6 is a flashlight well known to fans of the brand. Now we see it in a refreshed version, when it got a new diode: GT-FC40 12V with two tints available - warm and cool. Both tints have a high CRI, as high as 90, and can also boast the lack of tint shift. And the brightness? It is also something to brag about, because we get max ~ 3400lm. All this is locked in a heavy, durable casing - the head with decent cooling, knurled tube for 2x 26650 cells, and a forward type switch outlines the tactical purpose of the flashlight.



Pros:
+ lack of tint shift
+ What a power!

 

Cons:
- Rattling cells in the tube,
- Heavy- 550 grams of flashlight itself

About host - threads, knurling o-rings and so on
Rating: 8/10 


About light - UI, tint and so on
Rating: 9,5/10

 

1 - very bad flashlight hurts to look at, terrible quality, unable to normal use Sad
5 - average flashlight, at a reasonable price - for the average person "great". I expect all flashlights from brands like Convoy, Astrolux, Armytek, Sofirn, Nitecore, Lumintop to get a rating > 5, while good and recommendable flashlights to get rating in the range of 7.5 - 10.
10 - flashlight meets all my expectations in a given category (e.g EDC, headlamp, thrower), it's durable and neatly made, perfect light tint, worth its (even slightly inflated) price - just pure perfect.

I hope you enjoyed!

 

If you struggle choosing your perfect headlamp, check my headlamp guide, I compared 15 most popular headlamps there: CLICK

Edited by: Mocarny on 03/31/2021 - 14:28
MoreHiCRILumens
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Thanks for review. I so wait until I got mine ready. Led, check, driver on production and M21C should be the host then.

Any other lights that I could swap some GT-FC40’s in?

lazerEagle
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Thank you for doing great work ! Innocent

Looks like a compelling light, how does it compare as a thrower in terms of other modern flashlights? It seems a bit less SBT90.2 but high CRI? less throw than Osram but way more lumens, kind of like an angry XHP35 hi on its way to being a SBT90.2? lol

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Can you compare running time between 70.2 and FC40 version?

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MoreLumens wrote:
Thanks for review. I so wait until I got mine ready. Led, check, driver on production and M21C should be the host then.

Any other lights that I could swap some GT-FC40’s in?


But will it work with 1 battery only?
If so, it would be cool to have it in M21C

zeremefico wrote:
Can you compare running time between 70.2 and FC40 version?

I have 4×18A XHP70.2, I can compare those two on medium (both are ~ 1300lm) mode.
My batteries capacity in 4×18A and L6 should be roughly the same, ~ 50Wh

If you struggle choosing your perfect headlamp, check my headlamp guide, I compared 15 most popular headlamps there: CLICK

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Mocarny wrote:
MoreLumens wrote:
Thanks for review. I so wait until I got mine ready. Led, check, driver on production and M21C should be the host then.

Any other lights that I could swap some GT-FC40’s in?


But will it work with 1 battery only?
If so, it would be cool to have it in M21C

Yes:

https://budgetlightforum.com/comment/1755913#comment-1755913

Simon Mao wrote:
12V 2.5A 22mm for FC40 is in production
Mocarny
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MoreLumens wrote:
Mocarny wrote:
MoreLumens wrote:
Thanks for review. I so wait until I got mine ready. Led, check, driver on production and M21C should be the host then.

Any other lights that I could swap some GT-FC40’s in?


But will it work with 1 battery only?
If so, it would be cool to have it in M21C

Yes:

https://budgetlightforum.com/comment/1755913#comment-1755913

Simon Mao wrote:
12V 2.5A 22mm for FC40 is in production

S16 FC40 and I will take both 5000K and 4000K!!!

If you struggle choosing your perfect headlamp, check my headlamp guide, I compared 15 most popular headlamps there: CLICK

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Thanks, Mocarny, nice review !!

Regards,
Alex

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Thankyou , good review on this new L6 .

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Runtime
I will soon add a graph showing changing of brightness, now I have the temperatures, and also the brightness at minute 10.
Temperatures:
at 2 min: 40°C
in the 5th minute: 43,5°C
in 10th minute: 47°C
brightness in 10th minute: 1657lm

 

Did you ever make a runtime graph? From the info above, it appears that the light drops to 50% output after only ten minutes.

 

Nb

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Niobium wrote:

Runtime
I will soon add a graph showing changing of brightness, now I have the temperatures, and also the brightness at minute 10.
Temperatures:
at 2 min: 40°C
in the 5th minute: 43,5°C
in 10th minute: 47°C
brightness in 10th minute: 1657lm

 

Did you ever make a runtime graph? From the info above, it appears that the light drops to 50% output after only ten minutes.

 

Nb

 

I did, and it's worth mentioning that:

1) Brightness drops after ~ 4 min, which is not the best result (but pretty common that flashlight drops brightness from Turbo quickly. After all, it is just "Turbo" which is meant to be a momentary mode), but keep in mind my measurements are done at home, when you use it outdoor, especially in cold (like at night) environment, the flashlight will sustain Turbo longer. Don't give me wrong, 4 min is not a long time, and that "longer Turbo" would be maybe 6, maybe 8 minutes.

2) Temperature increases further, after my 10 min threshold, stabilizing at 62°C at the hottest spot (at the bottom of the head) - measured in 70th minute

3) This runtime is ... well, just a runtime. The flashlight got very hot, and it's impossible to hold it: 62°C on the head, 55°C on the battery tube, and 53°C on the tailcap.

 

I will add that graph today Smile

If you struggle choosing your perfect headlamp, check my headlamp guide, I compared 15 most popular headlamps there: CLICK

Coman
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How is the throw comparative xhp70.2 ? I have L6 xhp70.2 Big Smile

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GT FC40 Driver for Convoy L6

svitlo
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Boost drivers LM3481

Current sensor on the negative wire. Via an operational amplifier TLV333. Microcontroller SN8F570200A

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Is that a donut hole in the white wall shots?

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What is this LM3481 driver? External switch and diode.. non synchronous rectification.. ancient tech . Where did you found it? ;))

svitlo
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Quadrupel wrote:
What is this LM3481 driver? External switch and diode.. non synchronous rectification.. ancient tech . Where did you found it? ;))

GT FC40 Driver and switch for Convoy L6

new Driver for L6

“ Kit (GT-FC40 + Driver + Switch) for L6 Kit (GT-FC40 + Driver + Switch) for L6 Kit (GT-FC40 + Driver ) for L6”:https://www.aliexpress.com/item/1005002462853030.html

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Ahh .OK. Its the same only without fancy electrolytic caps ;))

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Can I get this in a single 26650 version?

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Received almost the same flashlight today. Only difference is 4000-4500K. Haven’t done any proper testing yet, but I did notice an interesting effect (apart from that the FC40 emitter is frigging huge!). When you turn it off, there’s an afterglow. And it’s not evenly distributed across the emitter, it’s more like a tiny snake game. Did anyone else notice this? It’s quite fascinating Big Smile

PS, no I did not look into the beam, I noticed when putting it down on the floor. There was a clear circle visible on the floor. Don’t look into the beam, just don’t Wink

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May have to add this one… for tons of output the FC40 @ 4000k has become my favorite. I have it in 3 differently sized lights and would love it in a full on thrower. My old S70 cooked it XHP70 and I am considering repairing it, not sure I will with this option.

EDC rotation:
KR4, SST-20 FA3 4000k (favorite!)
FW3A, Nichia 4000k sw40 r9080 (second favorite)
FW1A, LH351D 3500k (third favorite)
FW1A, XP-L Hi 3A
FW3A, LH351D 3500k
FW3A, SST20 FD2 4000k
FW3A, Cree XP-L Hi 5A3
Emisar D4V2, SST20 4000k
Emisar D4V2, brass E21A 3500k (night light of choice)

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Just used it outside for a moment (it’s finally dark. Yay!). Geez this thing puts out a wall of light Big Smile

Very pleasant beam as well.

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I just received my Convoy L6 GT-FC40 as well and love it. At first I didn’t think it was as bright as expected, but this is often my reaction to most lights I receive as I’m so used to my mega bright multi emitter lights. The second night out with it though is when I really was impressed wit it. For a single emitter light this thing is both a great thrower and flooder! The perfect all around light for backyard/ back acre viewing for when my pups are out late at night doing their business. Gotta keep them safe from the critters out here. Overall nice tint and very bright, but not so power hungry like some other emitters out there.

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Mocarny wrote:
Charging
There is no built-in charging, so you will need to arm yourself with a separate charger, preferably with 2 slots.

A word of caution concerning chargers. The cells need to be equally charged if you want them to last. My order included 2 Lii-50A batteries and they were not equally charged. Used a DMM to compare. So 1st thing I did was put them in a Liitokala Lii-500 4 slot charger. After it indicated done I measured again and to my horror there was roughly a 0.5V difference (4.18 vs 4.23V). Not good…

Long story short, I ended up using a single slot charger to make sure both batteries get charged to exactly the same voltage.

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A different type of beamshot Wink

There’s something very satisfying about a powerful beam and a nice spill lighting up falling snow. Makes it more immersive than usual.

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djans1397 wrote:
Can I get this in a single 26650 version?

Convoy M26C and M3-C have 1× 26650 and it’s available with GT FC40