For a 2ftx2ft you should be able to go with a single Hans panel from Bonsaihero.com, 65 or 80 watts.
For a 3x3 you'd better look at Area 51 (SGS 160 or XGS 190), or Plant Photonics, or even a couple of other brands wich are cheaper like Vipar, Blackstar, ... depending on your location, budget...