After careful deliberation, I have come to the conclusion that a 250 watt setup, over a 3x2' screen will be sufficient to give me a decent yiled. A 3'x2 ' scrog with a 250 watt hps will supply about 4500 lumens per sq ft (27000/6sqft). I know that 5000 lumens/sqft is optimal but I don't need my buds to be monsters even though I do want them to have enough lighting for relatively dense bud formation. I am going to set up a 50cfm exhaust fan on top of my grow box and probably the same cfm intake at the bottom of the box, directed up toward the lights (to bring cool air up from the shaded portion of the box). So far, I have a bubbleberry and 2 GDP that I have just topped at about 4" and am waiting to start LST. These are two of the strains that I grew with outside, so I have an idea of how they grow and what nute mix worked well (outside anyway). I will use this as a foundation during the indoor grow and watch my plants adjusting the mix and training based on my observations. I would like to know if my current plan of action seems like it is logical and sensible, or if I am missing something? Should I only use two of the plants instead of 3? when should I start flowering?