The Clamp Lamp is a very simple, very useful little light. Plywood base, a gooseneck, a light socket, and a cord are about all you need. Clamp it to a surface using a standard C clamp, and you're good to go.
I had an old construction light cover that I rescued from my grandpa's farm decades ago. Finally have a use for it.
I had enough parts to make a second one, but this time I attached a magnifying glass to the end of the gooseneck. Don't know how handy it is for me, but I like the look.