I have an outbuilding with electricity but no switched circuit from my house. I removed the motor and rail from an old garage door opener and used the remains to have a remote triggered light at the outbuilding. I added another light fixture outside the building connected to the opener's light inside. These lights in and outside the outbuilding stay on for only 3 minutes. That gives me enough time at night to see my way to the outbuilding and turn on a light. The wall mounted door opener button in the outbuilding gives me 3 minutes of light to find my way back to the house when I'm done.



The rails usually have a "T" cross-section which gives them a decent amount of strength and stability compared to angle iron. Some brands like Liftmaster have rails in one piece.

I like to weld and fabricate odds and ends from scrap and now that I have a steady supply of door openers, most things I make have some door opener somewhere in them vs. before when they had some bed frame in them.