home > resources > Guides > Lamp Guide: Fluorescent

Lamp Guide: Fluorescent

Miniature Bipin T-5 Min. Bipin	Medium Bipin T-8/T-10/T-12 Med. Bipin	Recessed Double Contract T-8/T-12 Recessed D.C.	Slimline Single Pin T-8/T-12	Circleline 4-Pin

The size and shape of a bulb is designated by a letter or letters followed by a number. The letter indicates the shape of the bulb while the number indicates the diameter of the bulb in eighths of an inch. For example "T-10" indicates a tubular shaped bulb having a diameter of 10/8 or 1 1/4 inches. The following illustrations show some of the more popular bulb shapes and sizes.

The size and shape of a bulb is designated by a letter or letters followed by a number. The letter indicates the shape of a bulb while the number indicates the diameter of the bulb in eighths of an inch. For example, "T-12" indicates a tubular bulb having a diameter of 12/8 or 1 1/2 inches. The following illustrations show some more popular bulb shapes and sizes.

T-5 Miniature Bipin
T-8 Medium Bipin
T-10 Medium Bipin
T-12 Medium Bipin
T-8 Recessed Double Contact
T-12 Recessed Double Contact
T-12 Recessed Double Contact (Jacketed)
T-8 Single Pin Slimline
T-12 Single Pin Slimline
T-8 Medium Bipin U-Bent Lamp
T-12 Medium Bipin U-Bent Lamp (6")
T-12 Medium Bipin U-Bent Lamp (3")
T-9 4-Pin Circline