Cost Per Light Calculator

Formula

The formula to calculate the Cost Per Light (CL) is:

\[ CL = \frac{P}{1000} \times T \times 365 \times EC \]

Where:

$CL$ is the cost per light ($/light/year)
$P$ is the power consumption of the lightbulb (watts)
$T$ is the average daily usage (hours)
$EC$ is the electricity cost ($/kWh)

What is the Average Cost Per Light?

The average cost of a light depends on the power consumption, the electricity cost, and the average daily usage of the lightbulb. On average, a lightbulb can cost anywhere from $10.00 – $100.00 per year, depending on how often it is on.

Example Calculation

Let's assume the following values:

Power Consumption (P) = 60 watts
Average Daily Usage (T) = 5 hours
Electricity Cost (EC) = $0.12 per kWh

Using the formula to calculate the Annual Cost Per Light (CL):

\[ CL = \frac{P}{1000} \times T \times 365 \times EC = \frac{60}{1000} \times 5 \times 365 \times 0.12 = 13.14 \text{ dollars/year} \]

The Annual Cost Per Light (CL) is $13.14 per year.