Originally Posted by THContent
From what I have heard, LED's are good for supplemental lighting, but NOT for primary, you should never stinge on lighting because yield will show you that you are lacking by the end.
HPS is definitely the right choice, start off with MH for veg, then when you go in to flowering, switch to HPS.
MH uses more of the blue spectrum of light, imitating that of the summer sky. HPS for more of the orange/red spectrum which the plants will use more during flowering (imitating the fall sky).
I would say stick with the MH/HPS, and if you wish, add LED as supplement. Growing solely on LED would not yield anything worth mentioning.