Base types:
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.
EGG - 750w clear tungsten-halogen T6 coil filament Medium Pre-focus 2000 hour color temp 3050 degrees K.
FEL - 1000w clear tungsten-halogen T6 coil filament medium 2-pin 300 hour 3200K
EHG - 750w clear T-H T6 coil filament med 2-pin 2000 hr 3050K
EHF - 750w clear T-H T6 coil filament med 2-pin 300 hr 3200K
FFS - 1000w wide flood TH PAR64 300 hr 3200K
FFN - 1000w narrow spot TH PAR64 300 hr 3200K
BTN - 750w clear T-H T6 planar filament medium pre-focus 2000 hr 3050K
