McR--xr reflectors and Cree XP-E / XP-G

[maxspeeds]

Hi Don and CPF,

I'm curious to know if anyone has experimented with the XP-E and XP-G emitters and the McR--xr line of reflectors. Are there any changes to the hotspot/spill/corona sections of the beam? I'm especially curious to know how it performs with the McR17xr reflector.

Cheers!
Joel

 

[DaFABRICATA]

Re: McR--xr reflectors and Cree XP-E

Hey Joel,

I just treid it with an McR18, McR17XR, and McR19XR.

It works fine with all but the McR17XR.

I assume if you trim the centering ring off the bottom of the reflector, the McR17 might focus well.

Hope that helps..

 

[Sgt. LED]

Re: McR--xr reflectors and Cree XP-E

I particularly like it with the 19Xr.

 

[maxspeeds]

Re: McR--xr reflectors and Cree XP-E

Hey Joel,

I just treid it with an McR18, McR17XR, and McR19XR.

It works fine with all but the McR17XR.

I assume if you trim the centering ring off the bottom of the reflector, the McR17 might focus well.

Hope that helps..

Thanks, Dafab! The centering ring is probably preventing the emitter from entering the "sweet spot" It looks like I'll have to join the 5a groupbuy

 

[maxspeeds]

Re: McR--xr reflectors and Cree XP-E

I particularly like it with the 19Xr.

Hey Sarge,

Great idea! I have an A19 that could use a new light engine.

 

[McGizmo]

Re: McR--xr reflectors and Cree XP-E

I haven't played with the XP-E. I am waiting on some sample XP-G LED's that I do plan to experiment with. :shrug:

 

[DaFABRICATA]

Re: McR--xr reflectors and Cree XP-E

I haven't played with the XP-E. I am waiting on some sample XP-G LED's that I do plan to experiment with. :shrug:

Hi Don, Please keep us updated!!..:wave:..

I also have tried the McR38, McR27S, McR27, & McR27XR with the XP-E....all seem to work fine as long as you get the emitter in the "sweet spot".

 

[maxspeeds]

Re: McR--xr reflectors and Cree XP-E

Hi Don, Please keep us updated!!..:wave:..

I also have tried the McR38, McR27S, McR27, & McR27XR with the XP-E....all seem to work fine as long as you get the emitter in the "sweet spot".

Dafab,

Did you notice any difference in the beam distribution w/in the hotspot/corona/spill when comparing the XP-E and XR-E in the XR reflectors?

 

[maxspeeds]

Edited the title to include the now available XP-G emitter. With this new emitter on hand, I'd like to know what reflectors it performs well with.

 

[maxspeeds]

Bumparooski. Interested to know if anyone has experience with the McR12 reflector :tinfoil:

 

[mcmc]

Good thread, max.

To add to it: what corresponding McR reflector is the main-beam portion of the LS20 reflector most similar to, does anyone know? Wondering if the LS20 could benefit from a XP-G or E mod.

 

[McGizmo]

I have been carrying a prototype LunaSol 20 that sports a XP-G behind the original reflector. I say original because the reflector being used in the LunaSol 20's out there have been modified by a small removal of the rear of the original reflector (~.015" as I recall). The center reflector in the LunaSol 20 is the McR-12. I believe the McR-12 will work at its best with the XP-G if it is elevated slightly above the ceramic case of the XP-G. I mentioned a prototype LunaSol Elcipse elsewhere and that is what this particular light is. The XPG has three levels of output. I consider all three as having good utility by virtue of the flood type beam. The spot on low has merit because of its relatively large angle of coverage, IMHO.

I have been doing some bench testing of the XP-G for my own interest as well as in some joint interest with a couple other light builders. Although the package is tiny, the apparent image and source of light is not as small as one might think. I believe this had been addressed in other threads already.

I had some custom MCPCB's made to host the XP-G and function in my present Light Engine assemblies. I was very pleased to find that one of these light engines screwed in behind an original McR-20 reflector (Luxeon III based and pre-joker) in an Aleph 2 head with very acceptable results, IMHO. By my reckoning, the ideal focus was found by elevating the rear of the McR-20 ~.010" above the rear plane of the XP-G package or in other reference, .010" off the MCPCB itself.

Behind the McR-12, the XP-G will give you a large spot and the intensity of the spill is not radically off that of the spot. I personally don't care for high contrast between spill and spot but obviously this is not a candidate for great throw.