I previously had an article about these light fixtures published on the now defunct Arizona Inverts website. It covers a very economical way of building lighting for your tanks. Since the original article is gone, I thought I’d revisit it, and post a new version here.
The project centers on using extruded polystyrene (XPS) rigid foam insulation to construct boxes used as light fixtures for your tank. XPS is easy to handle, score, and cut, and it also resists moisture even after exposure to standing water. I purchase it in 4′ x 8′ sheets at the local Lowes or Home Depot. Continue reading NOT UL Approved!