## What are the dimensions of a BR30 light bulb?

3.75 inches

Like all light bulbs, the “30” figure represents the bulb’s diameter in 1⁄8 of an inch; therefore, a BR30 is 3.75 inches in diameter.

**Are all BR30 bulbs the same size?**

The number following the letters in a recessed light bulb indicates size: it’s the diameter of the light bulb in eighths of an inch. So, a BR30 is 30/8 inches, or three and 3/4 inches. An MR11 is 11/8 inches. So, you can swap out a PAR30 for an R30 or a BR30 – they are all the same size.

**How tall is a BR30 bulb?**

BR30 lamps are a type of lamp approximately 5 inches long and slightly less than 4 inches in diameter. They belong to category of directional lighting types, with typically a “wide flood” beam angle.

### Is BR30 the same as BR40?

BR30 vs BR40 In a Nutshell It’s pretty simple. The numbers 30 and 40 refer to the size of the bulb, which are measured in 1/8 of an inch. So a BR30 bulb measures 3.75 inches, and a BR40 is 5 inches.

**Are all recessed lights the same size?**

Recessed lights are categorized by their size. The most common residential sizes are 4-inch, 5-inch and 6-inch. This leads to the common question; “What is this size is actually referring to?” The answer is the size of the inside diameter of the housing (aka “can”) with the trim or LED module removed.

**Is BR30 the same as R30?**

The difference is simply the diameter of the bulb. R30 bulbs are the larger of the two bulbs. BR30 bulbs are actually the newer, more energy-efficient version of R20 bulbs and are the same size as R20s. R30 bulbs have a diameter of 3.75 inches, while BR30 bulbs have a diameter of 3.5 inches.

## How do you measure recessed lighting?

Recessed Lighting Sizes To determine the size, measure the diameter of the cut-out opening in inches, not including the trim. Choose one that will accommodate the height of your ceiling or the size of your wall. 4-inch and 5-inch fixtures are great in kitchens for providing overhead countertop lighting.

**Will a BR40 fit in a 6-inch can?**

Typically BR40’s are used in 6-inch recessed can fixtures in the ceiling. 6-inches is the diameter of the opening of the recessed cans. 5-inch recessed cans will be difficult to fit since the diameter of a BR40 is already 5 inches.

**How do you measure the size of a recessed light?**

### How do you measure recessed lights?

Calculate Lighting Placement A good general rule for placement is to divide the height of the ceiling by two. The result is the amount of space to leave between each light. For example, recessed lighting spacing for an 8-foot-high ceiling would be 4 feet between each light.

**Can I use BR30 instead of PAR30?**

The number indicates the diameter of the lamp portion, not the base of the bulb. Notice that a PAR30 is the same diameter as a BR30 bulb. You can swap these bulb types to change from wide to spot, depending on what you need in each location.

**Are BR and R bulbs interchangeable?**

What is the difference between Par and BR/R bulbs? Both kinds of bulbs are practically interchangeable, depending on your space and your lighting needs.