Review: Sky Ray 9xT6 - The King of HOT Rods?

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Dale
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Great review!!! The run temp on this light is a deal breaker for me. I wonder if all multiply cree lights heat up similarly. I only have one multipe Cree light.. The Trustfire TR-3T6…. Havent noticed any heat issues. But it isnt running near as many lights. I am also looking at the trustfire AK-47… It has 11 cree lites… I watch for temp on it. Sorry, went in a ramble there..again.. Great review

baterija
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More than just using the head to heat water for tea, this looks like some other severe heat issues.

The XM-L datasheet mentions max junction temp of 150C. The thermal path can’t be bad with the head heating so quickly. With the external temp pushing towards 100C after 30 seconds junction temp still has to be high. Accelerated aging of the LEDs is at least not dangerous.

The cells worry me more. The good news is they are reasonably insulated from the body temp. There’s some air gap between them with only a small surface area of shrink wrap actually in contact. The bad news is waste heat from internal resistance is based on the square of current – W = I^2 * R. A quick google just put me in the ballpark of 9-100 mOhm per cell. .027-.3Ohms for the three in series. With a 6A draw that’s .97 to 10.8 Watts of waste heat inside the cells. We can kind of ignore internal resistance heating in most cases but a 6A draw quadruples a 3A draw and is nine times a 2A draws heating. Again they’re pretty well insulated so that won’t spread that quickly once the light is off. The head will cool faster than the cells giving a possibly false impression. This certainly isn’t a light where I would even think about using cells that showed a higher than normal voltage sag under heavy load.

I be interested in some temperature measurements of the cells themselves after a run on max.

Richie086
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Hi FMCamaro, hope you don’t mind I post this in your thread.

Just received my Sky Ray 9xT6 from Ric today. Looks great and all was flawless as FMCamaro indicated in his review. Using 3 Trustfire TF-26650 5000mAh (43000mAh actual) fully charged to 4.20v, current reading on HIGH mode was exactly 3.68 amps. These trustfire batteries don’t sag much at all, no doubt why on high mode the amp draw seems low. I’ll take some beam shots tonight comparing it to my Trustfire TR-J12, Skyray King CW version, and perhaps my DRY.

Richie

Werner
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Use thick wires for current measurement. You could test following, measure tailcapcurent then while you are measuring short the tips of the multimeter if the output of light increase your wires are to thin….hope you get what I mean.

The heat “issue” is only at warm temperatures, so if I now go out in the cold it gets warm but not hot. Wind and convection adds additional cooling. And at all you have think about that the power decreases continuously because we are using 4Ah Batteries for 6A so voltage drops every minute and this beast is not regulated…

If I put it in my living room with 73 degree Fahrenheit (23degree Celsius) and no wind it gets very hot very fast I have done this once and had to cool it with water…outside no problem.
Warm batteries are good because more powerful…

FMcamaroZ28
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Werner is correct. You need stronger leads.

Ill re-take my own measurements on mine. The ones in my review were actually his.

I also need to go the outdoor shots like i promised @attitude.

Werner
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With standard leads I get 3.x amps too.
I’ve done a quick walk outside and this thing is so bright I love it, normally you have a tight spot far away which is bright or you have a floods bright is in front of you, but with this you have everything bright.
No real heat at 30F outside temp. Just normal warm body, so sad that I have no temperature sensor which is suitable for this…
So now I have to charge my batts again, tomorrow there will be snow and with that reflective thing everywhere I will need sunglasses Big Smile

One thing happens often there is condensation on the middle of the glass, where the three LEDs are in the center….

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Okay folks, I switched out my standard DMM cables for much heavier 12 gauge wires and get 4 amps on high mode up from 3.68a. I still think it has something to do with these Trustfire 26650 cells. These cells can really handle a lot of draw put on them.

I also tested it with 3 X Redilast 3100 18650’s charged to 4.2v and got 3.5a on HIGH. This reading was also using the 12 gauge probes on my DMM.

Richie

Werner
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With 18650 I got low readings as well, I tried this because my26650 came later than my lamp. I use soshine 26650 4Ah protected.

You have the TF flames 26650? Or which?

Richie086
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Werner wrote:
With 18650 I got low readings as well, I tried this because my26650 came later than my lamp. I use soshine 26650 4Ah protected.

You have the TF flames 26650? Or which?

I have the Trustfire 26650 flames 5000mAh from Manafont (real ones) and also Redilast 18650 3100mAh

Richie

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Here are some beam shots comparing the Skyray 9 to a few others. Not the best photos, but I did use a tripod for the camera. Funny thing is there wasn’t much of a difference in output for the first 3 lights until I tried the Skyray 9XT6.

The Trustfire TR-J12 and SkyRay 9XT6 both had fully charged 3X Trustfire 26650 flames 5000mAh installed, and the DryTurbo and Skyray KING had Redilast 18650 3100mAh.


SKYRAY KING


DRY TURBO


TRUSTFIRE TR-J12


SKYRAY 9 x T6

Richie

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skyray

 

look at the ridiculous amount of light that the 9xT6 puts out!!

 

MOUSE OUT FOR SKYRAY 9xT6 MOUSE IN FOR TR-J12

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first off. thanks for them beam shots. secondly, i did not know the tr j12, was thaaaat much brighter and floodier than the king. i mean its not that much, but easily noticable.
and i didnt even know that the dry was brighter and floodier than the king, i thought it was the other way around.
but dude, that skyray 9 is a killer! geez that thing is bright. if they made a stubby version, id be all over it!
i still want to wait for review on that new 12xml, if its not as floody, then i may have to purchase this sky 9

FMcamaroZ28
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NZ Shooter wrote:
FMcamaroZ28 wrote:

skyray

 

look at the ridiculous amount of light that the 9xT6 puts out!!

 

MOUSE OUT FOR SKYRAY 9xT6 MOUSE IN FOR TR-J12

It’s a large amount of light indeed. I’d like to see how my 18 stacks up against your SkyRay…. Obviously I am going by pictures, but I would have firmly believed that SkyRay pic was a J18, if I were told so. Same amount of spill, light intensity, and very similar colour temperature.

Mind you, I guess it would be the same colour temperature, you just have 2 more LED’s than a J18 Party

I just ordered a J18 from FastTech

Ill get beam shots probably tomorrow for you!

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FMcamaroZ28 wrote:

 

 Voltage High    Medium Low  
12.6V 6.20A 1.80A 0.67A 
11.8V 5.95A1.80A 0.70A 
11.0V 4.70A1.40A 0.55A 
10.5V 3.90A1.15A 0.40A 
10.1V 3.10A 0.95A0.35A 

 

Light Output: ★★★★★


Wow, that’s almost 80 Watts! But there’s quick drop – is it visible?
Werner
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I don’t know, but I think that it should be visible.
I want to do this test again with a timebase of about 5 Minutes or so, but I am too lazy…

oRAirwolf
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Can somebody recommend some good 26650’s for this flashlight? I dont own any of these batteries yet and I’d like to buy some quality ones that will fit in this light. What do you guys recommend?

I was thinking these, but I dont mind paying more for something quality

http://www.fasttech.com/products/1420/10000901/1076400-trustfire-26650-3...

FMcamaroZ28
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Those will work just fine. You may want to wait a bit and see if anyone else chimes in who is using them however. My keeppower’s protected’s were too long to allow the tail cap to fully screw down.

Maybe someone can get a length measurement of a protected TF 26650 and ill do the same for my Keeppowers, this way we will know if they definitely fit before you buy them.

I also have to still do those outdoor beamshots. My 26650’s are charging.

I also have some pictures of the inside of the head and the driver.

It’s not what we thought at ALL

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FMcamaroZ28 wrote:

skyray

 

look at the ridiculous amount of light that the 9xT6 puts out!!

 

MOUSE OUT FOR SKYRAY 9xT6 MOUSE IN FOR TR-J12


ridiculous is exactly what came to mind

i wish somebody would make a short version of 9 or 12 xml (ie cells physically parallel)

‘must. be. patient.’

____________________

Girls can shoot!

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FMcamaroZ28 wrote:
I also have some pictures of the inside of the head and the driver.

It’s not what we thought at ALL

Now you have me worried. Should I wait on this purchase???

FMcamaroZ28
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Its not a huge deal – the “pill” is not like the picture that the posted in post #2.

Its actually a flat alum plate that all the LED’s sit on a ridge for inside the head

Directly under that is a pretty hollow hole where a nice chunk of copper is just begging to be placed.

As you can see from the temps the heatsinking is pretty good as is and I wouldn’t hesitate buying it again.

Ill post the pictures when i get home from work tonight so you can understand.

On the plus side – driver upgrades would be CAKE on this thing.

Richie086
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oRAirwolf wrote:
Can somebody recommend some good 26650’s for this flashlight? I dont own any of these batteries yet and I’d like to buy some quality ones that will fit in this light. What do you guys recommend?

I was thinking these, but I dont mind paying more for something quality

http://www.fasttech.com/products/1420/10000901/1076400-trustfire-26650-3...

I use these Trustfire batteries in all my powerful 26650 size lights. They are simply great and afford the maximum runtime. I’ve only purchased them from Manafont and also have 3 more Trustfires on the way, which will live with the Skyray 9T6 exclusively, and should arrive this week. Just be careful you are not purchasing fakes, as they can be dangerous in a powerful light like this.

Richie

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Richie086 wrote:
oRAirwolf wrote:
Can somebody recommend some good 26650’s for this flashlight? I dont own any of these batteries yet and I’d like to buy some quality ones that will fit in this light. What do you guys recommend?

I was thinking these, but I dont mind paying more for something quality

http://www.fasttech.com/products/1420/10000901/1076400-trustfire-26650-3...

I use these Trustfire batteries in all my powerful 26650 size lights. They are simply great and afford the maximum runtime. I’ve only purchased them from Manafont and also have 3 more Trustfires on the way, which will live with the Skyray 9T6 exclusively, and should arrive this week. Just be careful you are not purchasing fakes, as they can be dangerous in a powerful light like this.

Do you have a caliper? Measure one of your batteries and then we can tell Richie if they would be the ones to get.

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FMcamaroZ28 wrote:
Do you have a caliper? Measure one of your batteries and then we can tell Richie if they would be the ones to get.

Sure thing FM.

I was getting 68.78 mm long or 2.70 inches for each battery, but I had to use a piece of tape on the positive to keep from shorting the battery, so they are slightly shorter in length. I did get 25.91 mm wide or 1.02 inches, which is exactly what the Manafont specs call out. I thought it was a good idea to actually show how 3 × 26650 Trustfires sit in the Skyray 9 and Trustfire J12 also.


Skyray 9 x T6


Trustfire TR-J12


Trustfire 26650 5000mAh (real ones)

Richie

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OK so i did the same for you with my protected Keeppowers.

 

batt

 

So three of them stick out this much from the end tube

 

tube

 

So there you go. 

 

I would suggest getting the trustfire flames, or a protected type of King Kong if you can find them anymore.

 

Here is how much i cannot screw the cap down

 

cap

 

Hope this helps!

Werner
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Soshine 26650 are okay too 68mm long

My head doesn’t unscrew I have tried this sometimes, perhaps am I not wrong enough and I will not make scratches in it with tools…

FMcamaroZ28
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updated with inside the head shots.

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FMcamaroZ28 wrote:

OK so i did the same for you with my protected Keeppowers

Hey FMCamaro, I’m amazed at how long those Keeppower batteries are and how far they are sticking out. Yeah, if possible, get a set of the Trustfires from Manafont. They’ve been performing fantastic and seem to fit everything I’ve been installing them in.

Richie

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Since this light is so easy to mod, I’m looking into upgrading the driver to the KD 9 LED Series Circuit Board. I have an email into them to see if they can reprogram it as a 5-mode rather than the 3-mode (no blinkies of course.) I’m getting 4amps on HIGH mode as is, but I don’t really know how much more the KD driver will put out, but I’ll give it a try and let everyone know.

Richie

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I saw that too. The only problem I see with that is that it lowers current as you approach 60C. Stock that only takes 10 mins to get there. I can’t imagine at the power that thing puts out… you can probably only run it for like 45 seconds!

Let me know though. I’m interested!

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Werner wrote:
Soshine 26650 are okay too 68mm long

My head doesn’t unscrew I have tried this sometimes, perhaps am I not wrong enough and I will not make scratches in it with tools…

Let the light run on high for a few mins. It unscrews real easy then. I did it with my hands. There’s only a small amount of thermal paste holding the parts together. Just watch when you are unscrewing that the reflector does not move. You may accidentally break the leads.

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