so you'd like to cover a 3x3, what is your max budget?
those chinese blurple lights use misleading marketing tactics. that 1200w light is not a 1200w light. in fact, they don't even tell you the actual power draw anywhere on that site. for that reason alone i would not buy that light or any light from that manufacturer, ever. i found in the Q&A that the 600w is drawing 270w. so the 1200w is probably actually around 500w.
so is that the right amount of light for a 3x3? well it is a little too much. you want 30-50 per sq foot of actual power draw, so 270w(hi efficiency LED)-450w(lo efficiency LED).
using $269 as a budget, you're only in the realm of a chinese light or a DIY. if you're open to DIY you can head over to the "LED and other Lighting" section and start reading. If not, well that light you've picked out WILL work. Just expect the drivers to take a shit after 1-2 grows, expect individual diodes to burn out, and expect the company in China to offer to fix it IF you pay to ship it ($$$$$$$) and wait literally half a year. if you cant increase the budget, well then youll have to roll the dice.
https://www.mars-hydro.com/led-grow-light/mars-sp-series-led-grow-light/buy-mars-sp-150-led-grow-lights-for-for-sale
here is a brand new chinese light that is affordable and efficient. this is the top of the line of cheap chinese grow lights imo. 2 of these would do well in a 3x3 and only cost ~$40 more than what you've selected and the only chinese grow light i would personally consider.
https://timbergrowlights.com/model-4vs/
here is an example of a light i would actually recommend. much more expensive, but uses high efficiency chips, high efficiency drivers with lifetime warranties, and warranties on the lamps themselves. American company in san diego.
Depending which country you are in there are probably cheaper options that are just as good.
Also, an upgrage to CMH or HPS would be a substantial step up from CFL and not require as large an investment as LED.
