I've tried the DE 250 watt 10000K's. They are pretty bright, white. No real blue tint, actually have a tiny bit of a yellowish tint that would easily be blued up with some blue or even actinic T5 or VHO. Personally, I dont like them. I'd rather have a pure white lamp with a slight blue tint, absolutely no yellow.
They are NOT the same bulbs that Sanjay tested on his site. he has not tested these or atleast he hasnt posted any data. A total guess would be ppfd in the 70's maybe low 80's and probably around 9000K give or take 500K with shield on M80 ballast. But that's just a guess, I could be way off.