Cree tint question

RonnieBarlow · Nov 7, 2006

I apologize for this n00b question; I did search the forums and couldn't find an answer.

How does the tint on a Cree LED compare to, say, a UXOJ Luxeon? Warmer, whiter, cooler, etc...

Thanks!

chevrofreak · Nov 7, 2006

Cree uses tint bins too.

RonnieBarlow · Nov 7, 2006

As varied as the Luxeon bins?

Cree lottery, and all that?

Christexan · Nov 7, 2006

Someone the other day said they are "tighter" bins than Luxeons, but I'm not sure if that was for tint, Vf, luminous flux, or all the above.

x2x3x2 · Nov 7, 2006

from what i seen, the XR-E Crees are cooler than Luxeons.. but, havent got any greenish tinted XR-E, which are common with Luzeons.

chevrofreak · Nov 8, 2006

This isnt overlayed 100% exactly, but I got it close enough to see which bins are similar.

The black boxes and text are the Lumileds tint bins while the purple boxes (not the grid lines) and the red lettering represent the Cree bins. Also keep in mind that the Cree LED's are binned at 350mA, so driving them at 700mA (Luxeon III drive current) will make their tints shift slightly more bluish. They can be directly compared to a Luxeon I.

cree%20vs%20lumileds%20tint%20bins%20relabeled.gif

Pumaman · Nov 8, 2006

good job chev

RonnieBarlow · Nov 8, 2006

That is outstanding, chev. Thank you very much.

LEDninja · Nov 9, 2006

Newbie did some tint testing of 2 samples ofthe Cree XR-E
6402 and 7207 degrees colour temperature
http://candlepowerforums.com/vb/showpost.php?p=1670873&postcount=77
http://candlepowerforums.com/vb/showpost.php?p=1672437&postcount=84

EDIT
Newbie did some more testing. Effect of drive level on tint.
http://candlepowerforums.com/vb/showpost.php?p=1681968&postcount=93

Anglepoise · Nov 9, 2006

I have a couple of 'WG' bins. Very nice slightly warm white with no
green tinge, that I have seen all too often in some LuxIII.

coyote · Nov 9, 2006

many thnx chev. i had been taking notes all week trying to figure out what you told me in seconds with that chart.

Cree tint question

RonnieBarlow

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chevrofreak

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RonnieBarlow

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Christexan

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x2x3x2

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chevrofreak

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Pumaman

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RonnieBarlow

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Anglepoise

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