dude i think the look awesome but im kinda a noob. ur only 4 days into flower, those things are gonna get big quick.
Like Surviveors mentioned, getting the light to all of the plant is a big issue with such a canopy and only a 600w. If i could suggest only one thing to you it would be to build some cfl lights and get em down low under the canopy, even on the floor pointing up. u can sit them in the plant pot or bucket if u rly wanted, they stay pretty cool. Also the humidity, once again like surviveors mentioned, u need to get that lower in my personal opinion. i like it a slight bit dryer. around 40% rather than 50. check out my picks in my grow journal to gt some CFL light ideas. Mine will actually be dropped way down low with 2k above them. Just try to get the humidity down and get some fresh air it or Co2 generator.
Like I said, I am a noob but i think you'll get closer to 20 O's, Onions, Zip, Donut, whatever you wanna call em of nice dried bud. i wanna hear the smoke report. Love me some cheeze