CNQualityGoods now have XT-E LEDs in stock and only for $3.50!!! Ordered a couple, along with an XPG/XPE Empty P60 drop-in. these reflectors CQG sell give the best beam I’ve seen for XPG/Es. I just ordered SMO for better throw this time.
I also have a CW XB-D (on 10mm board) on the way from cutter, shipped yesterday so with a little luck it will be here Friday. I will see what the tint is like once it gets here and post it up here.
I ordered yesterday 3 of the CNQG ones on 11.5mm star, I didn't think where to place them yet, but wanted to play with them hehe.
I have just been having a good look at the datasheet for both the XP-G and the XT-E and (on paper and ignoring temp.) the XP-G looks like it is still the top dog of the 3.45mm^2 dies however this is temp. dependent.
Both LEDs in the R5 bin have an output of 139-148 lumen at 350mA with the XP-G reaching around 300% of that at bang on 1300mA. The XT-E does it at ~1350mA.
Beam angle is hard to tell as the XP-G has a more rounded output and the XT-E more linear however if I had to guess I would say the XT-E could have a 20% advantage, I doubt that means even 10% more throw though.
Both have the same gradient on the end of the current vs flux graph but it looks like the XT-E just beats the XP-G to the 50% mark (1/2 of 139-148 lumen). So the XT-E is more efficient at very low currents.
XP-G wins by a fair margin when it comes to forward voltage at 1.5A (XP-G: ~3.28V vs XT-E ~3.38V (+/- 0.02V).
Of coarse all this data is for the XP-G at almost room temp. vs the XT-E at 85 degrees C so its a bit like comparing apples and oranges, however from the flux vs temp. graph the XT-E gains almost 10% if at the same temp. as the XP-G and the XP-G loses ~15% if at 85 degrees C.
My conclusion: We will just have to wait and see how they perform in real life.
The XP-G has an S3 (or is it S2?) bin so still manages to hold 1st place of the two... until/if Cree decide to release the XT-E in a higher bin.
I have an older UK Q-Light host. It has no switch but a plastic tailpiece with an o-ring. You screw in/out to make/break. The whole light is made of plastic so it will have some copper added to spread the therms. I'm going to try it out with a linear regulator and maybe a dropping resistor. 2x18500 - 2p and wire the leds 2p x 2 (see old lumens "much sought after" thread.
Or maybe its downloads multilux thread on cpf. I get so confused
My KD 3-mode XT-E drop-in finally shipped today.
I think the theory was that this would be a big boost to keychain flashlights. This could theoretically allow a normal AAA light to hit 300 lumens, due to greater efficiency and less heat generation since more of the power is going into light and less into heat.
New parts did not arrive in time so I ended up with powering the 25 mm quad xte with 2 - 8 x 7135 drivers in the techjunkie/old lumens fashion 4p from a single 26650. Yesterday one half of a torn, empty envelope was delivered one month after the order date. Phooey, nuts, etc. Dx cs here I come.
Almost forgot about this thread/, my circuit boards arrived yesterday and I have begun trying to piggy back more 7135s onto them (for a triple XP-E red and triple XT-E)
I mentioned above that I would do a quick comparison of tints and whatnot once I got everything together (a XML U2 1D, triple XT-E and single XB-D) is anyone still interested in me doing so?
From what I can see so far (without comparing them all side by side) is that the XB-D is cool white around 7000k and has a yellow margin at the extreme edge of the beam (when without a reflector). With a reflector (the only one I had on hand was a DX 73mm one) the beam was very ringy with slight yellow splotches in it. Optics were even worse.