hello. thanks for this great sight. diy led cob light

im new to sight. thanks for your help.
I am needing some help on a led cob light parts compatability.
I want 4 cobs and driver compatable info.
my question is how to figure what driver I need, after I decide on cobs?
from what im reading on other builds,it looks like cxa3070 are good choice. I like 3500k. so how do I know what driver to use.? and then theres the issue of how hard to run the cobs? id like to get the most out of cobs,but not damage them or ruin there life span.how do I figure this out?
then I have issues finding available parts and best pricing. so then things get changed up to fit whats available.
thanks for your help.
 
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