I can only tell you about my own experience. Just like all the other jerks on this site. I would suggest fluorescents or MH for veg, and HIDs for flower. But, It's up to you which direction you want to go. Best hint I could give you, is to go for 50 watts per square foot of canopy. HID, LED, or whatever, it really boils down to how decent your genetics are and how well you can respond to the specific strains feeding habits. The thing you want to focus on if this is your first or second run is your temps and ventilation. Most important thing when growing indoors is having an exhaust, and passive intake. Plus a few circulation fans. Once you get your temps and humidity dialed in, then you can worry about how they like to be fed etc.