I can't say much about the Mars 2 lights, but I do own 2 of the 96 reflectors. Mine are the 3w chip, and I'm pretty sure yours are a 5w. I guess I would have to remember read each light's specs. With just one light, I was hard pressed for lumens in bloom phase, but I was only running one of the 96 reflectors. I did a bunch of pruning on the bottom and Scroged, which helped, but it was still tough to get enough light penetration. Due to the lack of light I bought a second one, and ended up with some pretty nice stuff. Due to experience, I would say one light was stretched for bloom in a 2x3 area. 2 lights cover a 3x3 nicely for veg or bloom. I have a home job set up at the moment with a 6 inch stationary clip up fan, and I supplement it with a 16 inch ocillating fan in bloom. 4x4ft tent should give ample room for everything and then some. Interesting to note as well, I did notice the plants seemed to uptake magnesium and calcium at a slightly higher rate than what I would have expected under HID. Since you mentioned it was your first grow, study up on the term "goldilocks zone". Im not sure with the 5w chip systems, but the 3w system is pretty forgiving when it comes to height above the plants. In veg i have the lights about 6 inches above the top of the plant. I'd look at your light specifications and adjust from there. Hope it helps and grow on. :bookworm::cool: