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[Buddyblazon]

66. It's a regularly used process in marijuana growing these days.

It's commonly referred to as "Sea of Green" (or SoG). You secure a tomato net (or something similar) horizontally at the level you want your canopy, and during the first three weeks of 12/12 (the "stretch" when the plant doubles to triples in size) you train it into trellis, opening up all the branches to receive light. You stop training when the "stretch" is over. From there you just let the flowers grow up out of the canopy.

I believe you're talking about training in a vertical manner as opposed to the horizontal one I suggest above. You can do that too. In fact, I've seen it used to great yields. In this type of grow, many time bare HID bulbs are dangled between the plants. Instead of generating a "footprint" of light, the bare bulb creates an "orb" of light, a much more efficient use of the HID bulb.

There's a thousand ways to skin that cat.