Here’s a build I put together using 10 Citizen COB CLU048 1212 80CRI GEN6 and a remote mounted Mean well HLG 320H 36B Driver. I mounted my driver remotely to keep the heat off my light and driver so they last longer. I also wired my fans with a vivosun fan control because with the amount of air flow I have in my grow the fans become overkill really. My Mean Well driver is enough to power my 10 COBs @0.89A ~30w ea. but I can always bump that up to a driver that can supply 2.76A to get a full 50W ea light. The total for this was $270.00. FYI CobKits is having a sale on their citizen cobs.