from Ching Viz Dictionary of Architecture
Lamp = any of various device for producing light or heat as by electricity or gas.
incandescent lamp = a lamp in which a filament gives off light when heated to incandescence by an electric current. Also called a light bulb.
bulb = the glass housing of an incandescent lamp, filled with an inert gas mixture, usually of argon and nitrogen, to retard evaporation of the filament. Its shape is designated bu a letter, followed by a number that indicates the lamp diameter.
lamp diameter = the max. diameter of a lamp bulb, measured in eighths of an inch.
filament = the threadlike conductor of an electric lamp that is heated to incandescence by the passage of an electric current.
incandescence = the emission of visible light by a body when heated to a high temp.
extended service lamp = a lamp designed for reduced energy consumption and a life longer than the conventionally set value for its general class. (aka. long life lamp)
efficacy - a measure of the effectiveness with which a lamp converts electric power into luminous flux, equal to the ratio of flux emitted to power input and expressed in lumens per watt.
rated life = the average life in hours of a given type of lamp, based on lab tests of a representative group under controlled conditions.
three way lamp = an incandescent lamp having two filaments so that it can be switched to three successive degrees of illumination.
Bulb types
A = standard rounded shape of general service incandescent lamps
B = a flame shaped bulb for low wattage, decorative incandescent lamps
C = a cone shaped bulb for low wattage decorative incandescent lamps
CA = a candle shaped bulb, low watt incandescent
R = Reflector bulb of blown glass for incandescent and High-intensity-discharge lamps, having an internal reflective coating and either a clear or frosted glass front to provide the desired beam spread.
PAR = parabolic aluminized reflector bulb of cast glass for incandescent and HID lamps having precisely formed internal reflector and a lense front to provide the desired beam spread.
ER = An ellipsoidal reflector bulb for incandescent lamps, having a precisely formed internal reflector that collects light and redirect it into a desired pattern at some distance in front of the light source.
A/SB = A bulb having a hemispherical, reflective silver bowl opposite the lamp base to decrease glare
G = a globe shaped bulb, incandescent, low brightness for exposed use.
PS = pear shaped bulb, large incandescent
S = straight sided bulb for low watt, decorative incan. lamps
MR = multifaceted reflector bulb, tungsten halogen lamps, highly polished reflectors arranged to provide desired beam spread.
TB = quartz bulb for tungsten halogen lamps, similar to standard A bulb but with angular profiles
tungsten lamp = incandescent lamp having a tungsten filament
tungsten-halogen lamp = tungsten lamp having a quartz bulb containing a small among of halogen that vaporizes on heating and redeposits any evaporated tungsten particles back onto the filament.
IR lamp = a tungsten-halogen lamp having an infrared dichroic coating for reflecting infrared energy back to the filament, raising lamp efficiency, and reducing radiant heat in the emitted light beam.
infrared lamp = an incandescent lamp having a higher percentage of its radiant power in the infrared region than a standard incan. lamp, often having a red glass bulb to reduce the radiated visible light.
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