The formula to calculate Footcandles (\(fc\)) from Lux (\(lx\)) is:
\[ fc = \frac{lx}{10.76391} \]
Where:
Lux (lx) is a measure of illuminance, the total amount of visible light illuminating a point on a surface. Footcandles (fc) measure the illuminance in footcandles, where 1 footcandle is equal to 1 lumen per square foot.
Let's assume the following values:
Using the formula:
\[ fc = \frac{500}{10.76391} \]
Evaluating:
\[ fc = 46.4515 \]
The Footcandles is approximately 46.4515 fc.
| Lux (lx) | Footcandles (fc) |
|---|---|
| 100 | 9.2903 |
| 200 | 18.5806 |
| 300 | 27.8709 |
| 400 | 37.1612 |
| 500 | 46.4515 |
| 600 | 55.7418 |
| 700 | 65.0321 |
| 800 | 74.3224 |
| 900 | 83.6127 |
| 1000 | 92.9030 |