Lux (lx) and footcandles (fc) are both units of illuminance, which measures the amount of light that falls on a surface. Lux is the SI unit, while footcandles are commonly used in the United States.

The formula for converting lux to footcandles is:

\[1 \text{ lux} = \frac{1}{10.764} \text{ footcandles}\]Or more generally:

\[\text{Footcandles} = \frac{\text{Lux}}{10.764}\]- Identify the illuminance value in lux.
- Divide the lux value by 10.764.
- The result is the illuminance in footcandles.

Let's convert 1000 lux to footcandles:

- Illuminance in lux = 1000 lx
- \[\begin{align} \text{Footcandles} &= \frac{1000}{10.764} \\ &\approx 92.903 \text{ fc} \end{align}\]

This diagram illustrates the relationship between 1000 lux (left, yellow) and 92.903 footcandles (right, orange). The height of each bar represents the relative illuminance level.

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