Brie,
Looks like you are good at growing Mexican/equatorial Pinguicula. Thanks for sharing your efforts with us.
I'd often daydreamed of doing something like this, too. But, when I was actively growing, I just couldn't spare the space. The closest I came, was making some hypertufa (artificial tufa rock made with cement mixed with perlite, gypsum and pumice). I used a 3.5" plastic pot, as a form, and made it with a planting hole in the top-center. After forming it, I removed it from the plastic pot and planted a Pinguicula gigantea in it, keeping it in a tray of water. It worked well enough, but certainly didn't imitate a natural environment as well as your setup does.
Did you find the T5 fixtures in the pet/aquarium section of Walmart?