400w hps/mh

Can I use this for an entire grow ?
I've seen alot of people say they use cfls for veg and the 400w hps for flowering but i have the mh conversion bulb can I use this for both veg and flowering, without the need of having to get cfls??

Yes, you can.

how big is the grow area? how many plants?if its like 4-6 plants then Yea man thats definitly gonna work out!