I was building my home office in my basement when I encountered a problem. I wanted a lamp to light my desk, but I also wanted to keep it off my desk and mount it to the wall or ceiling. I wanted an industrial, utilitarian look, which was hard to come across while I was looking through the various hardware stores in my area. The lights I did like were hundreds of dollars, and since I was just starting this new company and quitting my nice, stable job, I couldn't justify the purchase. Instead, I chose to build my own. The result is exactly what I wanted and cost right around $20 (which didn't include the Romex, wire nuts, and various fittings most home owners should have lying around).
The lights themselves are the world's most basic work lamps. They initially had large metal clips on them for clipping onto various surfaces, but I stripped those off. The plug was cut off, and the wire run through the 90 degree corner to attach to the Romex as well as the other light's cord. I bought the lights from the clearance bin at Lowe's. They were just over $1 a piece.
For more stuff I build, check out my website at timwasson.com.