Step 3: Attaching the light switch.
5) Using a drill, drill a pilot hole in the middle of a short side on the container.
(Note my little drill press? These things are awesome - I was able to pick this up for $40.)
6) Use the switch to measure out the appropriate size hole to cut into the container. It's important that the hole be as tight as possible, as the little tabs on the switch will lock it firmly into place once installed and prevent it slipping loose. It's always possible to enlarge the hole later if you undercut things.
7) Using a nibbling tool, expand and shape the hole to a rectangle.
8) Once the hole is cut to size, push the switch through. I set it up so that if the switch was knocked by a downwards strike (As if something was dropped on it), the lamp would turn off.