Start by asking 1) how much pot do you intend to yield? 2) how much plant (tall X wide) you wish to end up with in your grow space, and 3) how long are you willing to wait to increase your yield?
Those questions will balance your need to follow or select your strain's natural traits for yield and speed, growth characteristics, give you an idea of how long it will take that plant to achieve that size given your medium, and the time it takes to reach 30-50% of the height as measured between the maximum height of your lights and the top of your medium, and whether you're willing to wait as long as it takes to fill your grow space to its maximal capacity.