12 Shape and Diameter of Common Lamps

Aaron Lee

In the lighting field lamb bulbs are identified with a letter code to identify the overall shape of the bulb, and a numerical designation the represents the widest diameter of that bulb in (1/8) eighths of inches.

For example, a T8 fluorescent lamp would have a tubular (T) shape, and a diameter of 1 inch, or 8 eighths of an inch, while a T12 would have a diameter of 1 and 1/2 inches.

Lamps may also include voltage or power ratings which can be used to make sure that any lamp installed in a lighting fixture will not exceed its rated value of current and reduce the risk of fire or electrical hazards.

EX: A multifaceted reflector, or MR 16 lamp, has a diameter of 2 inches or 16 eighths of an inch.



Shape and Diameter of Common Lamps Copyright © by Aaron Lee. All Rights Reserved.

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