Watts to Lux Calculator

Formula

To calculate the illuminance in Lux:

\[ L = \frac{W}{A \cdot E} \]

Where:

\(L\) is the illuminance in Lux (lx)
\(W\) is the power in Watts (W)
\(A\) is the area in square meters (m²)
\(E\) is the luminous efficacy in lumens per watt (lm/W)

What is Watts to Lux Conversion?

Watts to Lux is a conversion used in lighting to measure the intensity of light. Watts is a unit of power that measures the rate of energy conversion or transfer, typically used to express the output power of engines and the power consumption of tools and machines. Lux, on the other hand, is a unit of illuminance that measures the amount of light that falls on a certain area. Therefore, converting Watts to Lux helps to understand how much light is produced per unit of power consumed.

Example Calculation 1

Let's assume the following values:

Power (\(W\)) = 100 Watts
Area (\(A\)) = 10 square meters
Luminous Efficacy (\(E\)) = 80 lumens per watt

Using the formula:

\[ L = \frac{100}{10 \cdot 80} = 0.125 \text{ lx} \]

The illuminance is 0.125 lx.

Example Calculation 2

Let's assume the following values:

Power (\(W\)) = 200 Watts
Area (\(A\)) = 20 square meters
Luminous Efficacy (\(E\)) = 100 lumens per watt

Using the formula:

\[ L = \frac{200}{20 \cdot 100} = 0.1 \text{ lx} \]

The illuminance is 0.1 lx.