After a lot of research I settled on a viparspectra for my "grow box" that I made out of recycled pallet wood. I cross referenced and researched a few different sites, forums, ratings vs. performance reviews and I have the links if you would like me to send them to you. For me it was a close decision between three options; Meizhi, Mars, and Viparspectra, all 600 watt as per the grow area which is very similar to yours (mine is 2.5 x 2.5 so the Vipar may be a little small for your needs, but who knows). What I noticed about the Mars reviews, or rather what I read was, that they tend to be a little light on the blue spectrum for vegging and I didn't want that and since I have an HPS and I'm hoping to have the best of both worlds. However I can't post the actual link yet as I just joined and I need some likes and more posts, but google was extremely helpful and I can send you all the links if you'd like (there are about 7). The HPS is Sun Systems 600 watt HPS and ballast since it was conveniently cheap and I picked it up since I've heard that it can help during flowering even if you have balanced spectrums.
Also: I just found this
https://www.rollitup.org/t/if-you-are-new-to-led-and-want-help-choosing-what-to-buy-post-here.633304/