Lumens Per Foot Calculator

Formula

The formula to calculate the Lumens Per Foot (LPF) is:

\[ LPF = \frac{TL}{L} \]

Where:

\(LPF\) is the lumens per foot (lm/ft)
\(TL\) is the total lumens (lm)
\(L\) is the length of the light source (feet)

What is Lumens Per Foot?

Lumens per foot is a measure of the light output per unit length of a light source. It is commonly used to compare the brightness of different lighting fixtures or to determine the appropriate lighting level for a space. This measurement is particularly useful for linear lighting installations such as LED strips or fluorescent tubes.

Example Calculation

Let's assume the following values:

Total Lumens (TL) = 1000 lm
Length of Light Source (L) = 10 feet

Using the formula to calculate the Lumens Per Foot (LPF):

\[ LPF = \frac{TL}{L} = \frac{1000}{10} = 100 \text{ lm/ft} \]

The Lumens Per Foot (LPF) is 100 lm/ft.