Seedling growth LED support

I bought few years ago a set of cheap growth LED, which worked very well. However, I placed them in such a way that I couldn't adjust their height. 

I saw a “light garden” model from a respectable vendor, and decided to create something similar using what I had in my shop : 8mm threaded rods and nuts. For 1/20th of the price of the real model :) The nuts lock the rod to the base (there's one under the feet, and one with a washer on top of it), but also allow me to adjust the height to follow the seeds growth. 

The bottom v2 brings more stability, and also has hexagonal holes for the nuts ! Much sturdier :)