I have 5 3500s on the way going to get the 190w I think it is meanwell at 1050ma. Ill order another 5 and driver in another month or so and by spring plan to have a third of the same going, maybe a lower wattage driver for the third. Looking to have around 450 LED watts up in the flower box by time I'm done.I just started using 4 clu048 4000k myself super nice cobs