What does R40 mean on a light bulb?

What does R40 mean on a light bulb?

Reflector (R) bulbs put approximately double the amount of light (foot-candles) on the front central area as General Service (A) of same wattage. Like all light bulbs, the 40 value represents the diameter of the bulb in 1⁄8 of an inch. Therefore, a R40 is 5 inches in diameter.

Are R40 and BR40 interchangeable?

Our selection of R40 and BR40 CFL bulbs are ideal for forward-beaming lighting applications such as recessed lighting and track lighting where direct light is of the utmost importance. The difference between R40 and BR40 bulbs isn’t size (they’re the exact same in that department) but beam spread.

What is the difference between R30 and R40 bulbs?

The 30 and 40 refer to the size of the bulb in 1/8 inches — 30/8 and 40/8 inches respectively. Or more simply, the BR30 is just under 4″ across and the BR40 is 5″ across. So when you’re choosing a bulb for recessed cans, the first thing to know is the size of the cans.

What does BR20 mean?

BR20 | BR30 | BR40. PAR (short for Parabolic Aluminized Reflector) bulbs are lamps with “spot light” features, meaning that they provide a beam spread that is typically lower than 45°. Use PAR bulbs when attempting to put a focused beam of light on an object such as in track lighting or illuminating artwork.

What does BR40 mean?

reflector flood lamp
What does BR40 mean? BR40 is a large reflector flood lamp. It is the largest of the R-style flood lights. We like to call them “flood lights” because the BR40, like its smaller siblings R20 and BR30, has a frosted diffuser to produce wider less focused light.

What is the difference between par 38 and BR40?

The difference between a BR20, BR30, and BR40 is actually the size or diameter of the light bulb. For example, a BR30 is 30/8ths of an inch or 30 divided by 8 which equals 3.75″ in diameter. The same example applies to a PAR38. Divide 38/8ths of an inch or 38 divided by 8 which equals 4.75″ in diameter.