Although I don't run LED's,I do use perlite,coco and vermiculite. Mix them just about 1/3 each. Maybe a tad more coco in the mix.
The coco offers some organic property to the mix that some of the beneficial bacteria and fungi might take to a little better.
I might be full of crap, but I'm having some fairly amazing results right now. I have used DWC, straight vermiculite, straight perlite, and soil but this mix so far has worked best for me.
My main nemesis growing is heat issues; Mainly caused by a piss poor ventilation system and lack of funds.
Y'all keep up the good work.......J