driverless

Looking to start a new experience with a.cob led grow ,probably a bunch of 50w ,probably 6-9 Wanted to ask a couple of questions are driverless LEDs useless as some people go on ? Quite confusing as the grows and articles based on research show otherwise Also is this due to the efficiency...

Anyone build a successful rig using direct AC powered IC LEDs? Searched the threads and found only three hits; not much enthusiasm it seems. However, given the price and ease of setup, I suspect this new breed of LED will be the preferred LED array setup in the future. $30 plus for 1 Cree COB...