What Is a C11 Bulb

The following numeric value is the diameter measured in eighths of an inch. For example, a C11 shaped chandelier bulb is 8/11 or (1.375) inches wide. … The diameter of the bulb is easily identifiable as the shape of the bulb while the length may vary depending on the manufacturer.

Are Type B and C bulbs interchangeable?

Blunt-tip (B) bulbs are very similar to C-type bulbs but have more of a torpedo or bullet shape. These bulbs can be used in chandeliers, wall sconces, pendant lights, night lights, decorative light strands, holiday light strands, and other decorative home lighting applications.

How do I know what base my light bulb is?

A further explanation of the light bulb base sizes, you can look at the letter-number references (E12, E17, and E26) to help understand a bulbs base style and size. The first letter designates the shape or form of the base, and the number represents the width of the base (normally in millimeters).