I just received this in my inbox. Thought you might be interested.
We proudly present a series of brand new white LEDs
WHITE LEDs based on ZnSe technology. These ZnSe LEDs emit white light without blue LED conversion YAG!
how it works:
ZnSe LED chips emitting two colors at the same time, one peak at 484 nm (blue) and one peak at 605 nm (yellow) - mixing these two wavelengths inside the epoxy housing "generates" white light:
http://www.roithner-laser.com/
http://www.roithner-laser.com/All_Datasheets/Pricelists/