True, the model switch that I bough is an SPST switch, which is a less-than-ideal replacement for the usual DPDT bypass switch. Nonetheless, I figured that I could make it work as a guitar bypass switch by having it control a simple DPDT relay.
I was about to wire it all up into my newest guitar pedal when I realized that this switch actually required 120 VAC to illuminate! What's up with that? This bugged me a great deal as I would be working with low-voltage DC, not high-voltage AC. This was not going to do.
I immediately resolved to replace the little bulb inside with an LED. This required a near total dissection of switch, but after a little figuring out, I am happy to report that the mission has been accomplished. Follows is a method for converting an illuminated Radioshack switch from 120VAC to 3-12 VDC.
Step 1: Go get stuff
An illuminated Radioshack switch (#275-671)
A 100 ohm resistor
A zip tie
A soldering iron setup
A flat head screwdriver