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Cool Luxeon with high CRI

  • ashishbhav
  • 10/18/2010
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for one application I need color temp of around 5000k to 6000k, with CRI of more than 90, is it possible? in all datasheets, it is defined that with 5000k color temp, typical CRI is around 70 only.
Please give suggestions or comments
Thanks,
Ashish 

Comments
  • 10/19/2010
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    The red and yellow broadband phosphors that make the LED's output "white" are what contribute to the Color Rendering Index, so there is an intrinsic tradeoff between CRI and color temp - ya can't have both.  Sorry.

  • 10/19/2010
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    One solution would be to use colow mixing. You can achieve high CRI for specific color temperature by mixing the right LEDs in certain ratios. It is a more complex and perhaps expensive solution, but it is indeed possible.

  • 10/20/2010
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    Dear OMannan_FLStech,
          Thanks, yes, it is possible for warm white products, but to get a cct of aorund 5000k-6000k, we need to mix higher cct LEDs also, which again has lower CRI. so combined CRI will again get reduced.
    Ashish 

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