What do the numbers on light bulbs mean?

What do the numbers on light bulbs mean?

The code number of a bulb consists of a letter or letters followed by a number. The letter indicates the shape of the bulb and the number relates to the diameter of the bulb in eighths of an inch. The bulb is “A” type and the diameter would be 23/8″. A 65BR40 is a 65 watt reflector 5″ in diameter.

How can you tell the size of a light bulb?

Bulb sizing is very straightforward and simple, it is based on the diameter of the bulb at its widest point, measured in eighths of an inch (⅛”). For example, the designation “T12” indicates a tubular bulb that is 12 eighths of an inch (12/8”) in diameter (or 1 ½”).

What are the sizes of bulbs?

Most bulbs are measured in eighths of an inch, however decorative lighting globe-shaped (or G) bulbs are measured in millimeters. For example, an S14 would be a sign bulb shape and 14/8″ (or 1.75″) and our decorative lighting G40 bulbs are globe shape and 40 mm (or approximately 1.5″).

Is E27 standard bulb size?

The E26 is the standard thread size group for bulbs in North America. In Europe it is E27. The number following the letter E is the diameter of the external thread screw in mm. So, for an E26 bulb, the diameter of the base is 26 mm, while the E27 has a base diameter of 27 mm.

Is E27 big or small?

Table of Edison Screw-cap fittings

What do the numbers on a light bulb mean?

A light bulb’s series indicates its shape, followed by a number code that indicates the light bulb’s diameter in millimeters or one-eighths of an inch, depending on the type.

How to find the size of a light bulb?

You can compare most common E size designations with a thread diameter, see the specific light bulb name for that size, see what are the most common applications, and even see the official standard for light bulbs. You can even use this chart as a lamp socket chart.

How big does a light bulb socket need to be?

Here is the light bulb socket size chart to help you determine what size do you need your light bulb to be. You can compare most common E size designations with a thread diameter, see the specific light bulb name for that size, see what are the most common applications, and even see the official standard for light bulbs.

Where does the part number come on an incandescent lamp?

Let’s start with the part number of a common lamp. In incandescent part numbers, the wattage always comes at the beginning of the part number. What is wattage? It’s the amount of electrical current used to power that lamp. You’ll notice on your utility bill you’re charged by kWh, or per kilowatt hour.

What kind of light bulb has a number?

Miniature Bulbs are a type of light bulb easily identifiable by a number or numerical/alphabetical code which conforms to International Standards set forth by ANSI (American National Standards Institute) and/or the ISO (International Standards Organization.

How big is a screw base light bulb?

Screw bases come in several sizes, and they are referred to by both a descriptive name and size. Unlike the light bulb shapes, the number in the light bulb base measures the light bulb base diameter in millimeters. The candelabra E12 has a diameter of 12 millimeters.

What are the different sizes of party lights bulbs?

The image below compares our G50 bulbs in all three base sizes. All three bulb socket sizes are available at PartyLights.com — C7/E12/Candelabra base, C9/E17/Intermediate base and Medium/E26 base.

How big is a miniature light bulb in diameter?

Choose a sub category: Miniature Bulbs commonly are low voltage by design but there are exceptions with some miniature bulbs being in the 120 to 230 volt range. Miniature Bulbs come in a variety of sizes and bases and filament designs. T-3/4 Miniature Bulbs are only 0.09″ (2.3mm) in Diameter while an R-12 is 1-1/2″ (38mm) in Diameter.