Originally Posted by oceangrownkush
2nd edit; In first paragraph I am thinking light dep w/panda coming up/down to manipulate hours, 2nd paragraph is after I found wooden designs and thought it would be awesome to have just straight black box w/permanent panda plastic and take plants in/out of box at correct time to get 12 hrs light... I think 2nd idea would be better/sturdier...
This is exactly what I did the first time I light-depped around six years ago: I built a simple wooden frame and enclosed it in panda plastic, white side out. A dehumidifier is a must, or you will definitely end up with mold. If the structure's close to your home, sticking one in there is a piece of cake. Schlepped those plants in and out at the same time every morning and evening; it worked fantastically. You can also purchase a pre-fab structure and give it the same treatment. This year I'm using a 10' x 10' canopy tent "walled" on the inside with a 15" x 25" sheet of black plastic. The outside walls are covered with white sunscreens. If I had more space, I'd probably use a portable parking structure.
There are many ways to assemble an effective forcing structure quickly, easily, and pretty cheaply. I'll be interested to see what other people are coming up with.