This is a model I designed because the grow lights in our mini garden didn't reach the top part of the plant, making it not grow as much. This model is very strong because of its certain geometry on the bottom part which supports the shelf and will not break. I printed this with a 0.8 nozzle to make it even more strong but a 0.4 nozzle will also produce a strong end result. I used two normal screws and mounted it where a stud was. Now all parts of the plants will get even light and grow a lot more.

Pls comment if any questions.👍