just make sure you get high quality light and they sure perform
I mean no advertisement but I have used FERO lights for quite some time now and I am very happy, I think they no longer sell to the public though (dont quote me on this) I believe they only sell to shop owner and hydroponic stores from now. They do business with AREA 51 lighting as well and they carry the same lights and lifetime warranty. (I believe AREA 51 actually designed AF series))
There are a few good brands out there and I recommend paying a few extra bucks and that way you dont have to worry about them not being on par with your expectation...
now excuse me I got some trimming to do