I decided not to place individual post lights at each instrument location on the panel. I wanted a red flood/spot light to provide general illumination. Part of this decision came from my desire to keep a very small electrical draw on the system - especially in the event that I encounter an alternator failure.
I went searching for a small torpedo style light that would fit into my 12 volt system. I contacted J.W. Duff Aviation in Denver. This company is a large established aircraft salvage business. They have acres of aircraft and huge warehouses full of salvaged parts. Mr. Duff said that he had just what I needed - new and in the box. He had purchased a lot of 500 from the manufacturer and had three left. He was right. The light was made by Grimes. It was new, in the box, and had a manufacture date of June 10, 1957. It was exactly what I wanted.
I mounted the light to the tubing in the upper right rear of the cockpit. The light is controlled by a toggle switch combined with a dimming rheostat.