Enter the led power usage (watts) and the led run time (s) into the calculator to determine the LED Energy.

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## LED Energy Formula

The following equation is used to calculate the LED Energy.

**Eled = Pled * T**

Variables:

- Where Eled is the LED Energy (Joules)
- Pled is the led power usage (watts)
- T is the led run time (s)

## How to Calculate LED Energy?

The following two example problems outline the steps and information needed in order to calculate the LED Energy.

**Example Problem #1:**

- First, determine the led power usage (watts). In this example, the led power usage (watts) is measured to be 86.
- Next, determine the led run time (s). For this problem, the led run time (s) is calculated to be 49.
- Finally, calculate the LED Energy using the formula above:

Eled = Pled * T

Inserting the values from above and solving the equation with the imputed values gives:

Eled = 86*49 = 4214 (Joules)

**Example Problem #2: **

Using the same process as example problem 1, we first define the needed variables outlined by the formula. In this case, the values are provide as:

led power usage (watts) = 60

led run time (s) = 4

Entering these values into the formula or calculator above gives us: Eled = Pled * T = 60*4 = 240** **(Joules)