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Well, Philips and Cree have been going back and forth for years on their chip efficiencies. In any given month, either one could be claiming the best LED out there.
But from what I understand (and I may not be right-- this was told to me by a Cree insider) all of Cree and Philips red, amber, and yellow dice are actually made by Osram. Cree is a silicon carbide company-- all of their production is actually just blue and white LED chips. Philips lighting also.
They both buy dice (unpackaged chips) in red, amber and yellow from Osram, and then put the chips into their proprietary packages. In the same vein, Osram buys all of their blue dice from either Cree or Philips...
So, if you have a Cree or Philips fixture with red, amber, blue and white, you are actually running chips made by Cree or Philips AND Osram.
But from what I understand (and I may not be right-- this was told to me by a Cree insider) all of Cree and Philips red, amber, and yellow dice are actually made by Osram. Cree is a silicon carbide company-- all of their production is actually just blue and white LED chips. Philips lighting also.
They both buy dice (unpackaged chips) in red, amber and yellow from Osram, and then put the chips into their proprietary packages. In the same vein, Osram buys all of their blue dice from either Cree or Philips...
So, if you have a Cree or Philips fixture with red, amber, blue and white, you are actually running chips made by Cree or Philips AND Osram.