Buy a new aquarium, and you often get hood lights that are ... meh. They're good enough, but not great.
There are plenty of high-quality replacement lights out there, but none of them had the nice, low profile of the plastic covers that came with this tank. So I decided to spruce up the existing illumination with some DYI lights — and even make them programmable with an Arduino.
That was more than a year ago. Now in coronavirus isolation, I finally made it happen.