I found a ring-shaped light in the trash, and decided to add it to my solar power system. It was intended go around a camera for photo and video lighting. I decided to hang it from my ceiling because it turned out to be the perfect size to go around the existing overhead light fixture. I chose to hang it from the existing light fixture to avoid making any holes in the ceiling. I wasn't worried about the weight because the electrical box originally held a ceiling fan. I needed something thin enough to slip behind the light fixture without damaging it, so I used some twine.
After I hung the ring light from the existing mains-powered light fixture, I connected a power cord that crossed the ceiling and then attached to a 3-way switch pair. The ring light is connected to my 12-volt solar power system. With the 3-way switch, I can turn the ring light on from the doorway or from my bed.
This adds to my collection of devices powered by my 12-volt solar power system. I have 4 LED lights, the ring light, sound system, roller blinds, phone charging station, dinner bell, and a plug for other devices like a pencil sharpener. Unfortunately, the marine starter battery that I've been using to store power is now 6 years old. It is still taking a charge, but might not have as many amps available. I've been doing charge/discharge cycles from mains power to see if that will help.
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