New Grow questions

Hey I just started a few plants from seed i got from some pretty good bud my friends smoked. I started them in Miracle gro dirt. Is that good dirt to use? My lighting is not that good i know i have a couple of flouresent grow lights like a total of 5 with about 70watts each. I am working on getting an hps and mh. But sense my light isn't that great i give the plants 24hours of light for now. especially sense they are in the vegative stage right now. How long is the vegative stage? And can i keep it in that stage for longer than required to increase the width and lengths of the plants? I was thinking about a total of 8 weeks 24/0. I just started day 1. And by week 3 i will have at least a 400 watt hps or mh. What light is best for getting the plant huge? I know that hps is best for flowering. But is hid or mh best for getting the plant big in vegative stage?

MH // T5 floro ( blue spectrum ) represents summer months better so is best for Veg. Alot use HPS and swear it works fine during this stage. To get the " best " results you would use both.

you can veg you plants as long as you want pretty much, just dont put them on 12/12 and they wont bud.

okay thanks

So sense my light isnt that good does it help to keep them in veg longer to produce bigger plants?