When to expect the XT-E White

[mds82]

Hi All. I have heard rumors that Cree will be releasing the XT-E in white, not the high voltage but a standard white. From what i heard it will be up to an R5 or S2 bin, but i dont know of any more info as to when it will be available. Has anyone else heard any more info on this?

 

[bshanahan14rulz]

I don't know the release date or anything like that, and I didn't see it during a quick perusal of cutter electronics xp-e section or xt-e section, but I believe it is actually going to be called an XP-E H.E.W. for High Efficiency White
http://www.cree.com/products/pdf/XLampXP-E-HEW.pdf

 

[evilc66]

XP-E HEW LEDs have been available for some time now, and is still based on the same XP-E die structure. The XT-E has a pyramid shaped die structure that was supposed to give wider viewing angles for remote phosphor applications. It seems odd that Cree would produce a white LED from that. Some may argue that a white LED would be great from this LED because of the higher output on the XT-E over the XP-E, but the increase isn't huge. I could be wrong though.

Also, the XT-E HV white is confusing. It doesn't share the same pyramid die structure as the XT-E royal blue.

 

[saabluster]

The XT-E in white is called XP-E HEW. I've actually torn down an HEW and know for a fact it is the same as the XT-E. I have commented on this before but I think it was a rather boneheaded move on Cree's part to call the HEW an XP-E. Creates too much confusion for those not in the know. The highest bin I know of currently for this HEW is R5. That is quite remarkable for a 1mmx1mm size die.

 

[bshanahan14rulz]

XP-E by itself only goes up to R3. Of course, since the whole dome is basically an emitter, the HEW would be better for architectural lighting than for focusing for high lux.

 

[saabluster]

XP-E by itself only goes up to R3. Of course, since the whole dome is basically an emitter, the HEW would be better for architectural lighting than for focusing for high lux.

Actually the normal die XP-E goes up to R4. Also I disagree that the HEW is not good for high lux applications. The whole dome is not light emitting. It is conformal coated just like the others but the coating covers the whole package. Some early info on these LEDs is misleading or false.

 

[degarb]

Few week ago I found http://lux-rc.com/view.php?p=content/blogs/beamshots He seems to demonstrate that the hew can out throw the xp-g of same bin in his tripple reflector. I think the concern was some weird color issue.

He also had the coolest beamshot script page around.


http://www.cree.com/products/xlamp_xte_hv.asp Says, non directional, but who knows. 46 volts, might take a few cells to get there.

 

[JacobJones]

Saabluster, will these throw further than an XR-E R2 EZ900 with an aspherical lens? I've tried looking at cree's datasheets to work out for myself but they're to complex for me to understand.

 

[saabluster]

Saabluster, will these throw further than an XR-E R2 EZ900 with an aspherical lens? I've tried looking at cree's datasheets to work out for myself but they're to complex for me to understand.

Assuming you can find true R2 binned EZ900 XR-Es then no the HEW will not beat it in an aspheric setup. The reason is that the raised die structure of the HEW means you can only focus on one level of emittance. Also although it is conformal coated it is done in a very poor manner with "holes" in the phosphor layer that allow patches of blue to show. To get this to work with an aspheric is doable you just have to defocus it a bit which will cause a loss of lux. That said if you were to design an aspheric light that was intentionally defocused(which I have considered) the HEW would be the better way to go.

 

[phantom23]

The XT-E in white is called XP-E HEW.

Are you sure? That's cool white XT-E:

http://cree.fleishmaneurope.de/wp-content/gallery/led-produkte/xt-e-hv-coolwhite-top.jpg

And it's different than XP-E HEW I have:

http://img341.imageshack.us/img341/5897/p1000625z.jpg

 

[saabluster]

Are you sure? That's cool white XT-E:

http://cree.fleishmaneurope.de/wp-content/gallery/led-produkte/xt-e-hv-coolwhite-top.jpg

And it's different than XP-E HEW I have:

http://img341.imageshack.us/img341/5897/p1000625z.jpg

Yes I'm sure. The first one is the high-voltage version XT-E. The second one is the HEW XP-E which is just the XT-E royal blue(not high-voltage) with phosphor. Someone at Cree is just being boneheaded trying to create confusion.