If I was starting from scratch I would buy switchable system..mh for veg and hps for
flower, but you need both bulbs...MH-agrosun gold/49%more red spectrum(you could use this all the way through...hps-eye hortilux w/enhanced blue spectrum...(also can be used all the way through...if you want just one lamp, choose one of the above...
I just got my 1000w hortilux, waiting on ballast...Zandor claims, (and I believe him)
2 lbs. per plant with this lamp and that is what he uses all the way through entire grow
hope this helps...goodluck