Interesting light! Looks like an improved C8, curious to see beamshots too 
Sweet!
That particular store has some interesting stuff.
If I was was still buying lights blindly, I would have made several purchases.
Looks like old stock on lights that we played with 5 years ago. They even sell a 12x7135 driver with stacked chips :sunglasses:
Exactly but they seem to updated some “Oldies but Goodies”.
I wish people did more with the C12s adding some XHP 35/50/70 to then and see if those fins provided any better cooling.
Not necessary. They wont.
have to agree here, those fins are only good for cosmetic purposes
Well, I just bought myself one…
I’m not sure if the C12 finning is the best possible design, but I’m sure they do something, they are increased surface area and near the heatsource. And to me they look like they significantly add to the heat shedding to the air compared to a C8.
So why won’t they?
Too bad there’s no neutral tint choice. Will be easy to swap emitter, but it does add some cost.
No air flowing inside fins.
Any heatsink made to use without fan should have 5-8mm between ribs. Otherwise air flows same way as there is solid surface.
It is hard to explain. I hope somebody from forum have equipment to take thermal image - X6 is good example to show what I am saying.
Also, usually people think that ribs surface is smth special and more important than solid flats and curves. This is not so, in most situations ribs surface have half less air flow. This means thay you need to take just half of ribs area to calculate heat spread increasing (i.e. 200sq.cm + 20sq.cm/2=5% increase, all numbers are random). In most situations you need hundreds % to feel difference (modern leds quad/triple light have 20-30w power with 5-10w host abilities).
just look at any equipment that uses heatsinks with no fans, ribs are at least 3\8 apart, and up to an inch long, in some cases even longer.
Why did they make that middle fin thicker than the others?? :confounded:
oooh, what a nice light!
It is very well built, I have to say.
- square threads
- anodised threads
- no sharp edges
- perfect Reflector (it’s C8 size, hence the name)
- big switch
- nice driver
- LED on copper
- flawless beam - no hole, just a tiny bit of yellow corona
- driver UI is very useable (no flash like the KD driver at low mode)
- Standard-C8 Lens, so the Convoy AR coated will fit (already ordered :P)
- Convoy C8 bezel fits - but it’s a tiny little bit too small - you feel an edge between them - but it also looks kinda silly…
oneo minor flaw:
- The LED is glued in
- as Jerommel stated, one of the fins is bigger as all the others which does look pretty weird
All in all - this light is even better than the “”KDIY K5”:https://www.aliexpress.com/store/product/KDIY-K5-Cree-XHP50-2-White-6500K-Neutral-White-5000K-Warm-White-3000K-2650-Lumens/708513_32805632129.html” - even the beam poattern is much nicer (better hotspot - but it’s also OP vs. SMO)
Glad to read this as ordered one last week from a different source…cause I need yet another light! LOL
Can’t wait till I get it! (Slow boat from China.)
Kaidomain has been offering a c8.2 xhp50 for a few months now. I have several and they are quire good! Aliexpress has been pretty bad for me.
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To avoid anyone’s confusion with what wstrachan wrote above, I wanted to point out that, although the name is the same, the KD C8.2 has the traditional C8 body style and looks nothing like this light, the Manta Ray C8.2 is a completely different looking light, and fits 26650 cell.
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Somewhat similar to KD K5S but with knurling and no stainless bezel, there’s also an SST-40 version:
XHP-50.2, 4-mode, no blinkies, 3A High mode…$33.49
https://www.aliexpress.com/item/Self-Defense-Manta-Ray-C8-2-CREE-XHP50-2
SST-40 Version, 3-mode, no blinkies, 5A High…$29.50
https://www.aliexpress.com/item/High-Bright-C8-2-Luminus-SST-40-LED
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For anyone else who doesn’t like Aliexpress the Manta Ray C8.2 is available on ebay (only the complete light w/XHP50.2, not the host):
(All links are Non-Aff, I’m not affiliated with the seller in any way)
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HOST AVAILABLE…choice of OP or SMO reflector…$21.65
https://www.aliexpress.com/item/Manta-ray-C8-2-black-flashlight-host
Seems that getting a decent budget oriented XHP50.2 1x26650 light is not an easy task. Would like to see a comparison between the KD K5S and the Manta Ray 8.2. Both have precisely the format Im looking for (C8 size reflector and 1x26650) but both have kind of deal-breakers for me.
The K5S offers steel bezel, OP or SMO reflector and also your choice of tint. However I find it really ugly, especially when compared to such classic designs like the Convoy M2. Not to mention the cheesy looking red O rings, green tailcap and smooth body with no manufacturer engravings.
The stock Manta Ray C8.2. has only SMO reflector by default, no choice of tints, but it looks better in my opinion. For some weird reason the manufacturer had to make one of the cooling fins thicker than the rest, ruining the looks somewhat.
Does anybody know how they differ performance wise, and which one dumps heat better? Manta ray says it has integrated design, does also K5S have it that way? Which one comes with better driver?