Jaxman E2 measurements (Nichia 219B, bargain high CRI 18650)

I’m still jealous of your spectrometer. And the way you show the tint at various parts of the beam… it’s an amazing thing which answers questions I’ve had for a long time.

BTW, if you reflash the driver you can improve the UI, modes, and PWM. It could fix all the “minus” qualities you listed except for the pocket clip. :slight_smile:

Thanks for the excellent review.
I went to HKE website and seems they only have the 5700k neutral white beam available.

I believe that is the one reviewed by the OP.

If you want the Warm White (4000K) version, it is available at Fasttech.
See: [NO COMMENTS OR DISCUSSIONS HERE!] The BLF Deal Alert Thread - #1069 by 1dash1

If you don’t need CRI or spectral measurements, an x-rite i1Pro Display Pro will suffice and give you the xy-coordinates. However, it might not give perfectly accurate results depending on the spectral distribution, since it uses three lux meters with colored filters. But for $200 it is a steal and is able to calibrate a monitor too.

Firmware flashing of a driver is totally out of my scope of knowledge.

I’m also very interested in this kind of information but for now I’m lazy enough to be happy that you do the work and I just have to read the interesting results O:-)
But one day (when someone unexpected leaves me a large sum of money) I may just get my own equipment…

Thanks for the link.
No wonder I couldn’t find it at HKE and the price different between these 2 stores are quite huge

“If you want the Warm White (4000K) version, it is available at Fasttech.”

With very low price. It’s same model ?

You mention a clip for a dollar.
Where can I get that ?.
Thanks.

Check out the specifications and draw your own conclusion. :sunglasses:

There are two lights from Jaxman, each one available in 4000K and 5700K 219B-V1 R9050. There’s the E2 and the mini C8, in case you want more throw. I’d go with the E2, the floodier beam is a good combination with the high CRI light.

By the way, I’m sure it’s the newer 219B-V1, mentioned that already in another thread.

Everything that fits the Convoy S2 (or S2+ with the metal switch), will work with the Jaxman. For example this one or this from Simon’s shop

Excellent review. Thanks for posting

Excellent review. I have both E2 and mini C8 (the 4000K versions) from Fasttech and I can confirm that the visually perceived quality of light is simply superb. The AR coating is of good quality and it is vastly superior to the one used by EagTac on their Nichia 219 lights, like D25A or D25LC2. The mini C8 starts at high, that is the only difference in UI. My only point of concern is the use of four 7135 on the E2, which small head cannot efficiently dissipate the heat generated at high, and there is no timer step-down and of course no thermal sensor.

I have a long rant about AR coating and what it does to white light… and how I’d much rather have a cheap, plain piece of glass. But for now, can you tell if the lens makes the light any different than it looks with no lens? AR coating gives my D25A-219 a distinct blue halo: (and a warm green beam, but that’s not visible here)

Does the lens change the color of things reflected in it at an angle? For example:

Does the E2 or C8 lens change the color of white fabric if rested directly on top, like the AR-coated lens on the left here, or does it look like the bare glass on the right?

I’m just a little worried, since every AR-coated lens I’ve ever seen has defeated the point of high-CRI emitters.

About AR coatings: it must be clear that you cannot expect a flashlight to have them at the same level as pro-grade photographic filters like B+W MRC or Kenko Zeta. But those implemented by EagTac are simply outstandingly bad. They produce strong blue reflections of light sources. Those on Jaxman lights produce weak violet reflections, similar to L3 Illumination L10 with Nichias, or the more recent Lumintop worms with Nichias. The best AR coatings I have encountered so far in flashlights is on the Preons 2 with Nichias, which unfortunately are not available any more. Flashlight with Hi Cri LED but bad AR coating cannot be considered as Hi Cri flashlight. The Preons 2 with Nichias from Illumn.com are considered the best available flashlights for medical profession for good reason.

Has someone more Details which driver they used? Maybe a picture?

Brightless in Hi in C8 is same as in E2 ?
C8 also overheated in Hi ?

I hope the flashlight companies will understand this sometime soon.

Using bare glass isn’t such a bad thing. I mean, yeah, on a thrower you probably want a good AR coating (or better glass) to increase throw a little. But on EDC lights the AR coating doesn’t really provide any meaningful benefit. It just increases costs and decreases beam quality.

another great review and thread.
i would like to ask where to buy the same hosts that convoy and jaxman are using.
it appears they use the same hosts
does anybody know ?

To Evgeniy,

The current consumption on high on both lights is the same (around 1550mA according to my UT210E). The subjectively perceived total light output is also the same. Due to much larger reflector the hotspot on the mini C8 is much more tight, so it is a better thrower, but less suitable for short-range EDC. I must admit that ergonomics of the mini C8 is simply superb - it fits my hand like a glove.
Regarding the heat dissipation: I only measured the E2, and after 10 minutes on high its head heats up 30 degrees C over ambient (in my case from 18 to 48 degrees C). At that stage I switched it off to prevent possible damage. I did not measured the mini C8 (yet), but its head is much larger and much more massive, with developed ribs, so my hope is that when holding it in hand it will not overheat.