Even better yet!! Light is good set-up is super sweet!
ASAP lose the coco altogether it will mess up you sprayers and spray for shorter burst more often like 15 min every hour the roots need water more often. You can get a special timer from wally or homedepot with 12 on/offs. Also you need to flush out the res. use only water no nuts for a few weeks. Look up the times for aeroponics I have no real knowledge on that but 2 hours every 12 hours seems to be too little