Convoy L6... XHP70 Beast!

4823 posts / 0 new
Last post
klrman
klrman's picture
Offline
Last seen: 2 hours 7 min ago
Joined: 11/07/2016 - 22:44
Posts: 2336
Location: Canada

Is 10-12A discharge ok for a 26650 battery for the L6?

DB Custom
DB Custom's picture
Offline
Last seen: 14 hours 16 min ago
Joined: 01/13/2013 - 22:28
Posts: 20318
Location: Heart of Texas

10-12A is rocking along pretty good, fairly high end without being a top fuel dragster. Smile

klrman
klrman's picture
Offline
Last seen: 2 hours 7 min ago
Joined: 11/07/2016 - 22:44
Posts: 2336
Location: Canada

Thanks!  Wasn't sure as I don't understand the technical side of it but if you say its good, I'm good!

JasonWW
JasonWW's picture
Offline
Last seen: 1 hour 23 min ago
Joined: 10/22/2016 - 11:41
Posts: 11548
Location: Houston Texas

klrman wrote:

Is 10-12A discharge ok for a 26650 battery for the L6?


That is about the most a xhp70 can handle.

The xhp70.2 can handle 18 to 22 amps.

Texas Ace Lumen Tube calibrated with Maukka lights

Click this to go to signature links.

Survivor
Survivor's picture
Offline
Last seen: 2 days 19 hours ago
Joined: 01/22/2018 - 00:47
Posts: 11
Location: CA, USA

Sweet! It’s really a good one.

klrman
klrman's picture
Offline
Last seen: 2 hours 7 min ago
Joined: 11/07/2016 - 22:44
Posts: 2336
Location: Canada
  • Low – 50mA
  • Med – 200mA
  • High – 1700mA
  • Turbo – 5000mA

 

Based on the the L6 info above, for a set of 5200mAh batteries, would my run times be in the ballpark below?

 

Low=100 hrs

Med=25 hrs

High=3 hrs

Turbo=1 hr

 

 

mortuus
mortuus's picture
Offline
Last seen: 1 hour 8 min ago
Joined: 12/16/2014 - 09:33
Posts: 2098
Location: Sweden
klrman wrote:
  • Low – 50mA
  • Med – 200mA
  • High – 1700mA
  • Turbo – 5000mA

 


Based on the the L6 info above, for a set of 5200mAh batteries, would my run times be in the ballpark below?


 


Low=100 hrs


Med=25 hrs


High=3 hrs


Turbo=1 hr


 


 

I would say that looks very accurate on the runtimes more or less.

...where Frugal meets with Flashlight!

DB Custom
DB Custom's picture
Offline
Last seen: 14 hours 16 min ago
Joined: 01/13/2013 - 22:28
Posts: 20318
Location: Heart of Texas

Theoretically, yes.

Realistically run times will be longer as the light will quit pulling those listed current draws as the cell dies which will put the run time on a curve in the end.

I’ve wondered for a long time about absolute run time even on a constant current driver, because as the cell dies the driver will pull on it harder to maintain the set current and make the cell die even faster, so the tail amp draw goes up as the cell’s voltage goes down, would a 5000mAh cell deliver one hour of run time at 5A constant current? Don’t know that I’ve seen anyone chart that kind of driver out for provenance. (they probably have, I just don’t remember)

klrman
klrman's picture
Offline
Last seen: 2 hours 7 min ago
Joined: 11/07/2016 - 22:44
Posts: 2336
Location: Canada

I haven't been game enough yet to just leave my L6 on in different modes to test how long it really runs. 

wstrachan
Offline
Last seen: 2 days 15 hours ago
Joined: 02/19/2016 - 02:30
Posts: 621

I ran my L6 on the highest setting for over a half hour sitting on my bench with no cooling. It was pretty warm but still easy to hold and it didnt step down. I had done the spring bypass but no mod otherwise.

light addict....yeah I've got the bug.

Atrolux MF02_O2S
Imalent DT70
Emissar (All Models)
Lumintop ODL20C
Wuben A21 & T70
thrunite tn32 ut
acebeam k60
many, many others...

mortuus
mortuus's picture
Offline
Last seen: 1 hour 8 min ago
Joined: 12/16/2014 - 09:33
Posts: 2098
Location: Sweden
wstrachan wrote:
I ran my L6 on the highest setting for over a half hour sitting on my bench with no cooling. It was pretty warm but still easy to hold and it didnt step down. I had done the spring bypass but no mod otherwise.

I have also tryied run mine on highest for a long time, yes it gets warm but no way near that hot as the emisar d4 for example gets and its impossible hold without almost burning, but ofc i would never leave the light on highest unattended and go away. I was kinda scared before i got mine how people said here it quickly gets hot, thats not true at all the head is quite big and manages the heat very good if uask me and having it on for a long time doesnt feel like its an issue with heat really.

...where Frugal meets with Flashlight!

JasonWW
JasonWW's picture
Offline
Last seen: 1 hour 23 min ago
Joined: 10/22/2016 - 11:41
Posts: 11548
Location: Houston Texas

mortuus wrote:
I was kinda scared before i got mine how people said here it quickly gets hot, thats not true at all the head is quite big and manages the heat very good if uask me and having it on for a long time doesnt feel like its an issue with heat really.

You were probably reading about the highly modded L6’s. Simon has run tests of letting the stock light run on turbo for an hour with no air circulation. It gets really hot, about 60° C IIRC, but levels out then starts to run cooler as the batteries drain.

On my light doing 17A, it’s a different situation. It would burn you after 2 minutes. I dont even let it get that hot. Maybe 30 seconds on turbo at most (with fresh batteries).

The stock light is not bad at all.

Texas Ace Lumen Tube calibrated with Maukka lights

Click this to go to signature links.

mortuus
mortuus's picture
Offline
Last seen: 1 hour 8 min ago
Joined: 12/16/2014 - 09:33
Posts: 2098
Location: Sweden

JasonWW wrote:
mortuus wrote:
I was kinda scared before i got mine how people said here it quickly gets hot, thats not true at all the head is quite big and manages the heat very good if uask me and having it on for a long time doesnt feel like its an issue with heat really.

You were probably reading about the highly modded L6’s. Simon has run tests of letting the stock light run on turbo for an hour with no air circulation. It gets really hot, about 60° C IIRC, but levels out then starts to run cooler as the batteries drain.

On my light doing 17A, it’s a different situation. It would burn you after 2 minutes. I dont even let it get that hot. Maybe 30 seconds on turbo at most (with fresh batteries).

The stock light is not bad at all.

actually it said on gearbest specs where i bought it from that it can reach 80-90c on highest if left for too long i guess a silly typo?… but yea ok modded i can understand its a different story JasonWW.

...where Frugal meets with Flashlight!

JasonWW
JasonWW's picture
Offline
Last seen: 1 hour 23 min ago
Joined: 10/22/2016 - 11:41
Posts: 11548
Location: Houston Texas

It might have been 80° to 90°. It’s been a long time since I read this. It was hot enough to burn you. But it’s also a worse case scenario, because the act of holding it wicks away some heat and any type of air current also helps to keep the temperature under control.

Ps, I’m a °F user, not a °C user, so it’s hard for me to relate to Celsius numbers. Ughh

Texas Ace Lumen Tube calibrated with Maukka lights

Click this to go to signature links.

mortuus
mortuus's picture
Offline
Last seen: 1 hour 8 min ago
Joined: 12/16/2014 - 09:33
Posts: 2098
Location: Sweden

Yeah i understand JasonWW no problem Big Smile

...where Frugal meets with Flashlight!

singularity35
singularity35's picture
Offline
Last seen: 2 weeks 2 days ago
Joined: 10/07/2012 - 09:58
Posts: 178
Location: Philippines

Just got an L6. I think I like the Q8 a little bit more but it does seem to be less able to maintain max output than the L6.

Chuck Roxas

mortuus
mortuus's picture
Offline
Last seen: 1 hour 8 min ago
Joined: 12/16/2014 - 09:33
Posts: 2098
Location: Sweden
singularity35 wrote:
Just got an L6. I think I like the Q8 a little bit more but it does seem to be less able to maintain max output than the L6.

well the l6 has a bigger heatsink and head so that shouldnt be a suprise, also a lot more compact, they both are great lights tho but yeah it would be ideal if the q8 could handle heat like the l6…. lumens and heat isnt easy to solve.

...where Frugal meets with Flashlight!

JasonWW
JasonWW's picture
Offline
Last seen: 1 hour 23 min ago
Joined: 10/22/2016 - 11:41
Posts: 11548
Location: Houston Texas

singularity35 wrote:
Just got an L6. I think I like the Q8 a little bit more but it does seem to be less able to maintain max output than the L6.

It’s two different power levels. The stock L6 is about 3,800 lumen and the Q8 is 5k+ lumen. So about 40w to 60w. That’s 50% more heat on the Q8.

Texas Ace Lumen Tube calibrated with Maukka lights

Click this to go to signature links.

singularity35
singularity35's picture
Offline
Last seen: 2 weeks 2 days ago
Joined: 10/07/2012 - 09:58
Posts: 178
Location: Philippines
JasonWW wrote:
singularity35 wrote:
Just got an L6. I think I like the Q8 a little bit more but it does seem to be less able to maintain max output than the L6.
It’s two different power levels. The stock L6 is about 3,800 lumen and the Q8 is 5k+ lumen. So about 40w to 60w. That’s 50% more heat on the Q8.

I see. That’s probably why I was a bit more wowed with the q8.

Chuck Roxas

JasonWW
JasonWW's picture
Offline
Last seen: 1 hour 23 min ago
Joined: 10/22/2016 - 11:41
Posts: 11548
Location: Houston Texas

The xhp70 in the L6 is pretty much 4 xpl emitters crammed together. So both lights are capable of similar output. The Q8 has a FET driver which pushes them hard. The L6 has a linear or constant current driver and doesn’t push the emitter as hard.

Now if you swapped in a FET driver to the L6, it would be putting out about the same 5,500 lumen as the Q8.

So they are actually quite similar. One is just a 4 × 18650 light and the other is a 2 × 26650 light.

If you swap the Q8 over to xpl2 emitters you’d get about 8,500 lumen. Same thing with the L6. Swap in a xhp70.2 along with the FET driver and you get about 8,500 lumen.

I hope this gives you a better understanding of the two lights.

Texas Ace Lumen Tube calibrated with Maukka lights

Click this to go to signature links.

bigm
Offline
Last seen: 2 weeks 4 days ago
Joined: 11/12/2017 - 02:47
Posts: 58
Location: SW WI

How would sanding the base of the OP reflector affect throw? I’m wondering how much there would be to gain by focusing it like is done with the SMO reflector. Has anyone tried this yet?

singularity35
singularity35's picture
Offline
Last seen: 2 weeks 2 days ago
Joined: 10/07/2012 - 09:58
Posts: 178
Location: Philippines

JasonWW wrote:
The xhp70 in the L6 is pretty much 4 xpl emitters crammed together. So both lights are capable of similar output. The Q8 has a FET driver which pushes them hard. The L6 has a linear or constant current driver and doesn’t push the emitter as hard.

Now if you swapped in a FET driver to the L6, it would be putting out about the same 5,500 lumen as the Q8.

So they are actually quite similar. One is just a 4 × 18650 light and the other is a 2 × 26650 light.

If you swap the Q8 over to xpl2 emitters you’d get about 8,500 lumen. Same thing with the L6. Swap in a xhp70.2 along with the FET driver and you get about 8,500 lumen.

I hope this gives you a better understanding of the two lights.

Thanks for the excellent explanation.

All I know is if I put in charged batts and push the switch, light goes out one end. Smile

Chuck Roxas

JasonWW
JasonWW's picture
Offline
Last seen: 1 hour 23 min ago
Joined: 10/22/2016 - 11:41
Posts: 11548
Location: Houston Texas

bigm wrote:
How would sanding the base of the OP reflector affect throw? I’m wondering how much there would be to gain by focusing it like is done with the SMO reflector. Has anyone tried this yet?

The difference will only be seen with a lux meter. You won’t see it with your eye.

Here is my SMO reflector with the stock spacer and then with the spacer removed, the bottom taped up to prevent shorts and the reflector lowered a tiny bit. It basically makes the corona smaller. The light from the corona goes into the hot spot.

Your much better off doing the resistor mod or swapping to a SMO reflector. Those are changes that you will actually see a difference with your eye.

Texas Ace Lumen Tube calibrated with Maukka lights

Click this to go to signature links.

bigm
Offline
Last seen: 2 weeks 4 days ago
Joined: 11/12/2017 - 02:47
Posts: 58
Location: SW WI

Thanks JasonWW! Smile That’s good to know. Any idea how much better the L6 SMO reflector will throw than the L2 with the same emitter?

JasonWW
JasonWW's picture
Offline
Last seen: 1 hour 23 min ago
Joined: 10/22/2016 - 11:41
Posts: 11548
Location: Houston Texas

bigm wrote:
Thanks JasonWW! Smile That’s good to know. Any idea how much better the L6 SMO reflector will throw than the L2 with the same emitter?

No, but it’s larger size does make a difference and gives you an increase in throw. I’m sure there’s other people here that can give you some exact numbers, but I don’t have an L2 so I haven’t done any tests using it.

Texas Ace Lumen Tube calibrated with Maukka lights

Click this to go to signature links.

bigm
Offline
Last seen: 2 weeks 4 days ago
Joined: 11/12/2017 - 02:47
Posts: 58
Location: SW WI

Thanks for the input. I’ve been thinking of building an L2 or L6, but can’t decide what to build. Lately I’ve been thinking both: L2 with 2 cell tube and xhp50.2 for a nice all purpose light, and an L6 with single cell tube, xpl hi, and smooth reflector.

mortuus
mortuus's picture
Offline
Last seen: 1 hour 8 min ago
Joined: 12/16/2014 - 09:33
Posts: 2098
Location: Sweden
JasonWW wrote:
singularity35 wrote:
Just got an L6. I think I like the Q8 a little bit more but it does seem to be less able to maintain max output than the L6.
It’s two different power levels. The stock L6 is about 3,800 lumen and the Q8 is 5k+ lumen. So about 40w to 60w. That’s 50% more heat on the Q8.

sry nevermind, i thought the q8 also had 4000 lumens.. u learn something new everyday Smile and yeah q8 is using multiple emitters so i can understand that body host gets warm as hell on highest.

...where Frugal meets with Flashlight!

JasonWW
JasonWW's picture
Offline
Last seen: 1 hour 23 min ago
Joined: 10/22/2016 - 11:41
Posts: 11548
Location: Houston Texas
mortuus wrote:
JasonWW wrote:
singularity35 wrote:
Just got an L6. I think I like the Q8 a little bit more but it does seem to be less able to maintain max output than the L6.
It’s two different power levels. The stock L6 is about 3,800 lumen and the Q8 is 5k+ lumen. So about 40w to 60w. That’s 50% more heat on the Q8.

sry nevermind, i thought the q8 also had 4000 lumens.. u learn something new everyday Smile and yeah q8 is using multiple emitters so i can understand that body host gets warm as hell on highest.


L6 uses multiple emitters as well. The same exact dies, capable of the same exact power. It’s just different drivers responsible for the different brightness.

The Q8 emitters are spread further apart, the L6 emitters are close together.

The Q8 draws about 15A at 4v.
The L6 draws about 5A at 8v.

If we convert the L6 to 4v the amp draw becomes 10A.

So Q8 15A
—— L6 10A

These are the rough numbers I was using to get the reason the Q8 is brighter and hotter due to its higher amp draw.

Now if you want to get real numbers, if you bypass the springs on the Q8 and run Sony VTC6 cells, it can pull 21A and do 6,375 lumen as tested HERE by Tom E.

The L6 with a FET driver, stock xhp70 and Liitokala cells can pull 12A at 8v. That is 24A at 4v.

So Q8 21A
—— L6 24A

Pretty darn close. I would actually expect the Q8 to draw a bit more amps than the L6 due to its stronger batteries.

4 × 3,000 = 12000mah Q8
2 × 5,000 = 10000mah L6

Stronger, higher mah cells generally equate to less voltage sag and higher amp draws. To account for this reversal in amp draw, I’m guessing the L6’s higher voltage (4 emitters wired 2 in series and 2 in parallel) must create lower resistance in the driver FET as well as the wiring and circuits. Maybe a more experienced member here can explain the difference.

Now if we swap to lower Vf emitters like xpl2 on the Q8 and xhp70.2 on the L6 (same basic dies) then the amp draws will jump up again along with output.

DB Custom has swapped to xpl2 on his Q8 and figures it’s pulling about 30A and measures 10,200 lumen.

On the L6 I’ve seen 18A at 8v which about 36A at 4v. At these power levels the 4 dies being so close together seems to produce more heat and lower efficiency. So output is only about 9,000 lumen (assuming a top bin emitter).

So Q8 30A (might be higher, it’s hard to measure)
—— L6 36A

Aren’t flashlights fun? Lol

——————————

If anyone sees any issues or has questions let me know.

I left a lot of tiny details out just to keep this post “short”. Wink

Texas Ace Lumen Tube calibrated with Maukka lights

Click this to go to signature links.

giorgoskok
giorgoskok's picture
Offline
Last seen: 9 hours 47 min ago
Joined: 11/13/2015 - 10:46
Posts: 2660
Location: Greece

Only this part is not correct :

Quote:
4 × 3,000 = 12000mah Q8 2 × 5,000 = 10000mah L6

2* 4.2V 5000mAh batteries in seires equal to one 8.4V 5000mAh .

JasonWW
JasonWW's picture
Offline
Last seen: 1 hour 23 min ago
Joined: 10/22/2016 - 11:41
Posts: 11548
Location: Houston Texas

giorgoskok wrote:
Only this part is not correct :
Quote:
4 × 3,000 = 12000mah Q8 2 × 5,000 = 10000mah L6

2* 4.2V 5000mAh batteries in seires equal to one 8.4V 5000mAh .


No, it’s correct as far as actual power output.

5,000 8.4v = 10,000 4.2v

Using the lower voltage helps people to better understand and compare the power. This is a detail I left out so as not to confuse people.

Batteries in parallel you can add up the mah, but voltage does not increase.

Batteries is series you add up the voltage, but mah does not increase.

It’s a little complicated for the average person.

I just want to show the overall power differences. Does that make sense?

Texas Ace Lumen Tube calibrated with Maukka lights

Click this to go to signature links.

Pages