The original concept wasn't actually to include the plants in the design, but was to make a modular system for a grid of light bulbs on a ceiling. The decision to use copper tubing was influenced by the aesthetic of the location for the original project, but it fits well in many places.

The concept is simple enough, 32 bulbs are attached in a 4x8 grid, with two wires extending from each socket back to a main control box at the center. The fixture can be hung from a high ceiling or drilled directly into the ceiling using brackets.

For the copper tubing, I just used standard plumbers tubing from a hardware store. It's extremely flexible (almost too flexible) so much that all of the bend joints in the final design were done by hand. To cut the tubing I used a standard tube cutter. Holes were drilled in the larger tubing, just slightly larger than the small tubing, then the small tubing was fed through and soldered in place using a torch*.

*Torch soldering is what plumbers use for this kind of work, when you've done it a bit, it's extremely easy, but that doesn't mean it's not still very dangerous. There are plenty of guides out there on soldering copper tubing, and I'm not that experienced, so I'll leave those tutorials to the experts. But please heed their advice, may save you a trip to the hospital or burning your house down!