
Aloha Sanguine, Ms. Tina, & AFN~
1st thing is: *BOTH lights up and running Ms. Tina so thank you very much for all your help and support!
I just switched from two 600 watt HID's in a 4 x 8, to two Mars II 1200 watt'ers and the most noticeable change has been the heat, or rather lack there of. I live in a HOT climate so if I want to grow in the summer I had to make a change.
Centered on each side I see that I have complete coverage and penetration all the way through, and...
they seem to really love it (i'll post pics later).
I think you'd be happy with a Mars II 1200 for your space and could even go 1600 just in case you ever upgraded to a 5 x 5 or more. I got the 1200's bc I am thinking of upgrading to a 5 x 9 tent so I wanted to be sure I had enough "juice".
I think the 1200 watt'ers use approx. the same true watts as my 600, if I remember correctly (but its a "wake-n-bake" this morning, so I make no promises!). Either way I think you'll be happy with your choice.
Happy growing everyone~
aloha