ED's note: Before the videos were removed, I noted that one of them appeared to be a pirated version of a DVD made by High Times magazine. I also noted that I had sent a note to High Times telling them about it. I guess HT asked the pirate to take it down.
The videos generally outlined the importance of electricity, ventilation, plumbing, and water management.
But most projects begin with space planning and design. Space planning in the case of grow rooms is very important because floor space and lighting are inextricably linked.
The lights can only cover a certain amount of space—a light bulb in a warehouse is much less effective than that same light bulb in a closet—so space directly below the lights is premium real estate.
Light intensity is the key, and intensity drops off exponentially with distance from the bulb. For that reason, either the bulbs or the plants (or both) must be able to move as the plants grow.
Space Planning with Jorge Cervantes
How to get the same lighting efficiency in half the space: use casters. It is important to not waste light and space for more than just maximizing the crop yield. The lights are expensive to run.
This video shows a larger room than most remodelers will ever need to build, but it illustrates how to think about the space you need to convert and the importance of light distribution.