BUT we don't know what voltage those drivers are really putting out, unless you test with a volt meter.
CREE CXB3590 3500K 72V
Ok so from the data sheet I read it shows that the 72v cree runs best at 1200mA and to my under standing the factory Roleardo drivers if you use all four (two each) would be perfect for the 72v Crees. Would it be worth the $44 each to use these Cree or would the 1212 be as good for a lot less?