Cree's XT-E White announced
Cree's XT-E White announced
Whoa - Fwd voltage all the way down to 2.50v!
Dang, I need to replace all my flashlights again.
They have a very floody Typical Spatial Distribution, more than say XP-G.
Looks geared for room lighting systems.
Last edited by mvyrmnd; 02-07-2012 at 03:25 PM.
a) just kidding,
b) "very floody" works for me, and
c) I'm watching fixed lighting cost/efficiency, eventually planning on adding cove lighting everywhere.
Would have to do a comparison of the spacial distribution curves. The design looks like it might put more light into a reflector. May be an interesting flashlight LED.
It sure looks to have a 1mm by 1mm die, and given the very high binning temperature...This may be the first good news for thrower fans in a very long time.
XT-E left, XP-G right. I can't make heads or tails of it. Maybe the XP-G curve is plumper in the middle and lower at the edges though.
Spatial distribution is likely a far-field measurement and hence the source size does not play into it. It gives an indication, but only that, of how it will do in a reflector. However, given that it has that shape and the source size is small, one could guess that perhaps it behaves like a small source and would be better than the XP-G
I think the thing to do is figure out if the whole dome, or even the entire "clear" covering, corners and all, lights up, and then figure out an LED that has that same apparent size.
I like when Cree releases new LEDs. I just wish it would affect the prices of the "old" ones more ;-)
Cree makes power LEDs that aren't geared towards 'room lighting'?Looks geared for room lighting systems.
Any ideas on pricing / availability of these? Seems vaguely comparable to an XP-G but with less output as the current increases, so unless it's significantly cheaper, the XP-G's still better for mine. I think I'd want it to be at least 2/3 the cost. Yeah the voltage/current is slightly less, theoretically you could feed it 1.5A for the entire useable portion of a single lipo, but the XP-G is only slightly affected at the tail end of lipo life, depending on where you set your cutoff voltage.
PS. Where'd that spatial distribution image come from? Seems a lot different to the one on page 9 of the spec sheet? eg. I read 60% output @ 50degrees according to the spec sheet?
Looks like just under AU $2 each, but the site doesn't specify which bin/tint that is.
Interesting, Cutter has them (as darkmilk said, no bin specified) for about Aus$2 each, as opposed to the XP-G's at $5.50+ each! Have requested a sample, I was going to be tossing up between XP-G's and XM-L's (for "ludicrously bright" option, well, relatively), but these seem reasonably comparable to the XP-G for almost 1/3 of the price, just depends on whether there's enough lumens for my needs; I know, you can never have enough lumens, but considering a Luxeon K2 seemed to almost reach my initial goals, these suckers may well do the trick.
That said, the cost of the LEDs is nothing compared to the rest of the system...
Any thoughts on how these are likely to compare heat-wise? I'm not very good at interpreting the figures to deduce what kind of heat it'll generate.