150 watt hqi bulb with strange K rating

There was a bulb out a few years ago that still may be around, but it had a really good looking color in the picture. It had a real strange K rating like 65000k or something, not the normal 10k, 14k, or 20k, but it had a real purple blue look, with a hint of green.

I cannot for the life of me remember. I was thinking it was XM but haven't had any luck finding it.
 
They also came out with a 20K that is just as bright. Of course it is still more leaning to white but more blue than purple.
 
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