good advice all around, I'd say.

If you have 400wMH use it, If not, then buy fluoros...not always cheaper, but most come with 5 year warranty and can be purchased at hopot...

400wMH is great for your veg room (remember your vegged plants don't take up much space, the surprise comes after you switch to the 12/12 photoperiod) I will post a couple pix to show you what I mean.

Just for laughs, here are a couple pix of my 1st serious grow; (back in the Day, of course) Before, I knew that:
1. The longer you veg, the longer it takes for plants to finish.
2. The taller you veg, the taller the plants get, before they will finish, they also spread out all over, crowding each other and it was hard to keep up with hermie's)
3. Use fan to allow keeping light as close as possible to the canopy to decrease stretching.

anyway, this is under or beside a 400w MH and to the left, for flower I added my 250w hps. that is all I had at the time.

Have a good laugh on me, but remember, I am giving you the picture's of what became a jungle nightmare. These points/mistakes I made here, can help you newer growers, to perhaps bypass some beginner mistakes; Like I have shown here. Goodluck, lw