Would have bought vivosun ballast, have bought their bulbs many times without problem but I liked the three power setting options better on the iPower unit
I bought Hydrofarm for 10 bucks more, it's coming tomorrow. I've got two of them now going on three years both, no more iPower for me!
I suspect they are all basically the same Chinese junk with no quality control, I read a lot of reviews before I bought and it seems so, I saw some with almost 40% negative! Hoping for the best from the new Hydrofarm unit