Incandescents

Numbers following bulb letter like "R20" designate the diameter of the bulb in 1/8 inch increments.  So a R20 bulb is 20x(1/8)=2.5 inch diameter.

Peter Bulbs:

Medium Base
Intermediate
Candelabra


Decorative:
Torpedo
Flame Tip
Globes


Miniatures:


Appliance:


Reflectors:
R14
R16
R20
BR25
R30
BR38
R40

PAR:
PAR 36
PAR 46
PAR 56
PAR 64


Tubular:


Heat Lamps:


Christmas: