I said i feel like the light step down after 3 minutes. My eyes couldnt tell. It was slowly step down… i didnt see any flicks while the light step down…
I will do 10 minutes high test again on monday night using fully charged 18650, and i will also record lux number as well…
I know my light have thermal protection, because temp are 115.5 fahrenheit…
The MT09RT has a tripod socket.
I have used some of my other similarly equipped lights as a photography source for up to an hour. I don't run them in turbo mode as I don't want them changing or doing radical step downs while I'm shooting, so I usually select the level below maximum/turbo. I've never bothered to measure how hot they got as I was always comfortable grabbing them when it was time to switch them off.
Not so with my XHP35 MT09R. I set it on the the 4th step in Group 5 (the one below Maximum/Turbo) when doing a battery test. and it hit 151° F (66.1° C) after 20 minutes (measured with an accurate Fluke IR thermometer with emissivity set properly). That's certainly above the stated 55° C thermal regulation spec, and in the realm of burned skin and decreased Li-ion battery longevity.
I haven't run/tested mine on Turbo for any extended period of time because that's generally not the way I use my lights.
Does thermal regulation possibly only work on the maximum (Turbo) setting? Or only on (some) XHP70.2 MT09Rs?
here are my ceiling bounce measurement.
MT03 = 590 Lux (Gen 2 i think running XHP 70)
MF01 running NarsilM = 880 Lux
MT09R = 1060 Lux
Convoy L6 NarsilM 280Lux.
So here is my conclusion. Both version of mt09r will step down after 2 minutes from the high, and maintain at the medium mode for long period of time.,
It’s been 3 days since I emailed Dale and still no answer
I have an MF01 being shipped to Lexel to swap out the driver for the NarsilM. How do you like it? How does it compare with the MT09R? I read the lumens on the 219C version is 12k+ or more.
nice but what does lux translate to lumens ? i hope u do a video review of the light i look forward to that.
Hi
A forum member asked me to do the temperature test to see if it has thermal step down so here are my results:
My light version is XHP 70.2
Initial temp 26.5 degrees taken at the head
at 30 seconds = 39 degrees
at 1 minute = 49.5 degrees
at 1.5 minute = 56.5 degrees
at 2 minutes = 62.5 degrees
at 2.5 minutes = 67.5 degrees
I terminated the test at this point as the temperature keep rising and I dont want to take further risk.
My conclusion is that this light doesn’t have thermal stepdown but im not fuss. I can always ramp down if it gets too hot.
Same with my light, after 2 min i can also feel it must be around 65c or more then i ofc step down to lowest or so, but its weird if some lights has it and some not ?
I’ve had a problem with thermal regulation on my MT02. The light worked fine for a while (normal use outside), and I can feel thermal step down working, because the light would slightly reduce in temperature. The problem was that LVP would kick in too early at around 3.7V. I contacted Banggood and they asked me to do a runtime test. So while I was doing the runtime test, I checked the light after a while and it was blistering hot and the emitter was fried.
So sometimes thermal management worked, and at one point it didn’t.
I mod my MT03 with TA driver (Narsil firmware, temp set to 65 degree) and it step down around 64 degrees nicely.
not sure what’s causing the issues for the MT09R driver . Maybe they didnt flash the firmware properly or code error?
Yeah i like it a lot, i think my MF01 does make a real 12K lumens now with Lexel driver. I think NarsilM in this light is perfect since you can use the wide range of lumens the light can produce. Oh i like battery check feature a lot in NarsilM easy way of testing battery conditions.
I found ramping mode on MT09R ok but not perfect, at its lowest when ramping up it jumps in brightness which kind of annoying then it is smooth after that. NarsilM doesn’t do that, NarsilM is more linear too to your eyes.
I can’t translate that to lumens, but if i use Astrolux MF01 running NarsilM which is making real 12K lumens as a reference i can calculate roughly how much lumens my MT09R makes.
so with a little bit math (1060/880*12000=14454 Lumens) my MT09R is making roughly 14.5K Lumens for a NW version i think that is about right could be more or less since ceiling bounce is not a perfect way but can be close indication how light performs.
now with the same math my MT03 is making 8k Lumens which is also close, my MT03 is CW btw, while my convoy L6 is making 3800 Lumens which is a bit low should be close to 5K but my L6 batteries was not fully charged. update: with fully charged 26650s my L6 is making 4700 lumens.
What cell are you using?
Full charged?
Maybe cell are in bad contition.
Haikelite official or Haikelite USA
I repeat the question.
Do you know what color temperature has NW CW WW?
I was using Sanyo GA that were fully charged. I was worried about the state of the cells afterwards; maybe it had an impact on cell life.
WW = 4000K
NW = 5000K
CW = probably 6000K, maybe 6500K
Warm white was only available during the group buy though.
Thanks.
MT09R 70.2 Shoulld take about 18A on turbo mode (2S2P ) so ~9A per cell
GA’s data sheet says 10A continous discharge current so cell shoul be fine.
I believe this was the approximate calculated value; I haven’t seen a measured value, but I’m sure it’s close. I prefer to use higher drain calls like the 30Q or VTC6; you should get slightly higher output on turbo, and I keep thinking that a close to 10A load will have more impact on cell life to a GA than the 30Q or VTC6.
Ta driver or any upgrade driver is worth money. Upgrade the battery carrier as well. You could spend more money and swap all 18 led to xpl hi 6500 or 5000k, even 219c… it will definitely hit 16000 lumen. All focus lumen because of TIR lense…
Yes I only calculate value.
Probably you are right but the game is not worth the candle.
9A will be only on the begining. later it will go down.
So if you dont want to use only on turbo GA will be better option in my opinion.
Look at the cycle characteristics
GA page 4 https://www.orbtronic.com/content/Datasheet-specs-Sanyo-Panasonic-NCR18650GA-3500mah.pdf
VTC6 page 8 https://www.kronium.cz/uploads/SONY_US18650VTC6.pdf
^ Absolutely. It depends on what you want. :+1: