I started moving my plants outside today. They're moving into an uncovered 10 gallon tank on the north side of my house. The tanks sit in a 72" x 48" x 18" baker's rack. The light intensity here is about the same as my inside T-8s. It runs about 25% as bright as direct sunlight, measured by an incident light meter. That should give them an easy transition.
The green mesh on top is plastic covered bird wire. It should keep out squirrels and birds. (I hope) The mesh is form fitting and held down with 2 small bungee cords.