I've been looking on line for the evolution of the light bulb and a catalog of the different types and wondered if anyone happened to know of a handy source. I've found out a few things, such as the number after the letter classification tells you the highest width in eighths, such as a T-8 is equal to 1", an A-19 is equal to 2 3/8's inches, but I thought there might be an all inclusive sight around.
I had pretty good luck at Bulbman.com We got attached to the 15w sign bulbs with the S14 envelope. They really look good in any antique type accent light. These seem to be the only guys who stock them.
Medium Screw (regular household light bulbs) Mogul Screw Candelabra Mini-Candelabra Medium Pre-focus Mogul Pre-focus Medium 2-pin Medium bi-post Mogul Bi-post Recessed Single Contact Miniature Round Pin (i think - found on some MR-16 type projector lamps) Miniature Flat pin (i think - found on some MR-16 type projector lamps)
Most stage/studio type lamps also have a 3 character ANSI code.