When I say "wide" I mean facing the light wide. Deep is what I call going away from the light. Most of mine now are growing 28" high, 18" wide and only 8" deep. I tie occasionally if the side branches grow up too much into the higher ones just to open it up a little. Also started stair-stepping some back away from the bulb so I can set the container under the bulb and the plant will angle with the contour of the bulb. There's lots of light available below and above a vertical bulb.