Hey bro, welcome to the site. Im n the middle of my first grow, got a cabinet bigger than what ur planning now and i wish i woulda gone bigger. My cab is 16? deep, 54? wide and 50? tall. I got the height for want i want but other that that its too narrow for me. 16? isnt quite enough to be comfy. And, im running four 4? fluoro tubes, four cfls, and two exhaust fans pushin 30 cfm and my temps hit 92 around noon. I have to set my night period between 11am - 5pm to cheat the hottest part of the day. Check out my grow log, id post a link but im on my phone, thats why its so jumbled too, sorry. Just click my name and find my threads, i got pics of my grow cab posted for u to get an idea of what im dealing w now.