In stock form with the old XM-L driven at only 1.6A would probably give you about 500 lumens. And with aspherical lens you need to reduce another… say 20% even in full-flood (depends on how far it can zoom in), so you have about 400 OTF lumens if you are lucky. Throw wise I would estimate 60~70kcd with this kind of setup. Definitely not impressive by looking at the stock output but it has good potential to be modded and becomes a sick thrower.
I got one coming in hopefully by next week, and I’m gonna turn it into a white laser lol.
I think you are completely right here, I could not measure lumens because the head is too large for the entrance of my integrating sphere, but the output compares very well to my modded UF-T20 that puts out 450 lumen when zoomed out. I have also not measured throw but looking at the intensity compared to other lights 60/70 kcd also sounds about correct. In general for such a big light I would want both more lumens and throw coming out of it, in stock form the balance is not right. What should make people buy this light is the (for a budget light) unprecedented modding potential of 400+ kcd throw.
Everything above is just my guesstimation, I hope I’m not too far off.
Driver is the real bottleneck in modding this light, but if we manage to buy it with Gearbest discounted price ($27), plus XP-E2/XP-G2 on Noctigon, 17mm driver (be it Nanjg or LD-40) we will have a 300~400kcd kick-butt thrower at under $40!
I finally got a 1405 on the way (replacement for my unusable Courui)! cant wait, I’ll either be cutting it down for single cell or using a heavily modded driver based on the LD-29 with an XP-E2 @ 2.6A (as a toy [“white laser], not a usable carry light)
man i cant wait to get mine, thx djozz for sharing this with us and i may cut mine just like you did but i will machine it , well any soon beam shots ?
Obviously you have a good idea about it, at these currents the two leds have a very similar and maximum surface brightness, so throw would also be very similar. That said, for my UF-T20 I have a dedomedxpg2-pill(3A) and a dedomed xpe2-pill(2.4A), and the throw of the xpe2 is just a bit more, but the xpe2 led was cool white and the xpg2 led was neutral.
I remember a while ago I did a post about this, wait....found it:
Thank you very much Djozz.
So I’m going to try the xp-g2 for this flashlight (anyway, I don’t have an xp-e2).
Just another question from that emitters photo, did you test the dedomed xr-e?
I also have one from a long term stand-by mod and haven’t use it yet.
Don't bother with xre (even if ez 900)... Although it is far easiest emitter for de dome (pry off with pliers). XP emitters kills that old sucker in performance.
The die size of the xre and xpe2 is the same: 1x1mm (the xre ez900 is .9x.9 but that difference is not big enough to compensate for the brightness improvement of the xpe2)
I think the light emitting angle has nothing to do with maximum throw ability. What really matters is the surface brightness (luminance).
90º of light emitting angle means more light is hitting the lens and there are lesser lumens loss compare to 110º light emitting angle, but that only means the projected ‘die shape’ is bigger for the 90º angle (XR-E) since there is more light collected by the lens, doesn’t mean it is more intense and able to throw further though.
Bibihang, not sure but I think that if the die size is the same (1x1mm), the projected image will be also the same size.
If the 90º is hitting more light, would’nt be brighter so throwing further?
Man forget about XRE emitters. We all tried that in various configurations with dome or without so why spend so much words on explaining. Try and you'll see that it is junk compering to new line of XP emitters.
I have never compared the 90º emitter with the 110º emitter side by side, but based on my understanding the 90º emitter won’t throw any further given everything else the same.
Imagine this, if you put a pre-collimator lens in your aspherical flashlight the pre-collimator lens will help to gather more light emitted from your LED hitting the main aspherical lens, right? What you see as the result is the projected die image is bigger with pre-collimator lens, however the measured candela is actually still the same compare to removing the pre-collimator lens. I think this concept works the same on different LED emitting angle but I hope Dr. Jones or djozz can chime in and explain further on this.
