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Types of Light Bulbs #181340
10/04/08 01:30 PM
10/04/08 01:30 PM
gunther  Offline OP
Joined: Sep 2003
Posts: 60
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.

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Re: Types of Light Bulbs [Re: gunther] #181344
10/04/08 03:22 PM
10/04/08 03:22 PM
gfretwell  Offline

Joined: Jul 2004
Posts: 9,366
I had pretty good luck at
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.

Greg Fretwell
Re: Types of Light Bulbs [Re: gfretwell] #181456
10/08/08 07:23 PM
10/08/08 07:23 PM
kale  Offline
Joined: Nov 2002
Posts: 174
Follow this link to GE's catalog, it shows lamp shapes, bases and even element shapes.

Re: Types of Light Bulbs [Re: kale] #181459
10/08/08 08:26 PM
10/08/08 08:26 PM
HotLine1  Offline

Joined: Apr 2002
Posts: 7,091
Brick, NJ USA
The Grainger catalog also has a lot of bulb 'info'

Also, Philips Lighting website may be helpful o you.

As far as the 'history' 'Thomas Edison' for starters.

Re: Types of Light Bulbs [Re: HotLine1] #181463
10/09/08 07:36 PM
10/09/08 07:36 PM
frenchelectrican  Offline
Joined: Feb 2003
Posts: 939
Wi/ Paris France { France for ...
I do know the Sylvian do have good info on it as well.


Pas de problme,il marche n'est-ce pas?"(No problem, it works doesn't it?)

Re: Types of Light Bulbs [Re: frenchelectrican] #181501
10/13/08 04:07 AM
10/13/08 04:07 AM
techie  Offline
Joined: May 2005
Posts: 247
palo alto, ca usa
The letter indicates the type of bulb, the number is diamater in 1/8" increments. Additional letters may indicate type of filament, frosting, base type, distance from base to filament center, etc.

A few types off the top of my head:

A - standard "light bulb" style
G - Globe
PS - Pear shaped
T - Tubular
PAR - Parabolic Aluminized Reflector
R - Reflector
MR - Mirrored Reflector

Re: Types of Light Bulbs [Re: techie] #181502
10/13/08 04:22 AM
10/13/08 04:22 AM
techie  Offline
Joined: May 2005
Posts: 247
palo alto, ca usa
Base types:

Medium Screw (regular household light bulbs)
Mogul Screw
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


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