

The omnipresent incandescent bulb is the bulb everyone is familiar with and is still popular despite its energy inefficiency and relatively short life span. Incandescent bulbs are sold by watts, their warm yellow-to-white brightness is measured in lumens, and they have an average life of 1,000 hours.
Benefits of an incandescent bulb include a cheaper price tag, accessibility, and a wide range of styles and shapes (halogen and compact fluorescent bulbs are quickly matching this, however).
Incandescent Bulb Base Types
E12-Candelabra Bulbs
E14-European Candelabra
E17-Intermediate Bulbs
BA15-Bayonet
E26-Medium (a standard sized bulb)
B22-Bayonet (European standard sized bulb)
Popular Incandescent Bulb Types
A-A standard bulb
B-Torpedo Bulb
BR-Bulged Reflector Bulb
C-Cone Bulb
ER- Elliptical Reflector Bulb
F-Flame Shaped Bulb (for taper-style chandeliers)
G-Globe Bulbs (ex: vanity light bulbs)
PAR-Parabolic Aluminized Reflector Bulbs
R-Reflector Bulb (think floodlights and spotlights)
T-Tubular Bulb