You WILL be happier with a 600w.
Vegging plants for a long time in hydro is very difficult for a noob, especially running non-commercial strains that can't take much abuse. If you intend to get decent yield off ~4 plants, and just HAVE to run hydro, you will need to run large DWC units similar to waterfarms, like the ones weedhound built.
IMVHO.. start in soil and make yourself a mother plant to take clones off. Then switch to hydro when you can populate something like an ebb n flow with rooted clones for flowering.
Just fyi... hydro weed isn't in and of itself better quality. So make your style decision after informing yourself of all the options!
stinkyattic Reviewed by stinkyattic on . Looking for some experienced suggestions This will be my first time growing and I want to do it right the first time. I'm hoping to be able to grow some amzing bud. I'll be ordering some crazy stains (G13 Haze, Alaskan Ice, and Northern Lights are at the top of my list) online and I want them to reach their full potention. Peopl have told me that as a first timer I might get some decent nug but it won't be what I'm hoping for. Here is my plan for growing. Grow Box: I want to grow 4 plants in my 3'x4' floor area closet. I'm am Rating: 5