The formula to calculate Foot-candles (FC) from PPFD (\(\mu mol m^{-2} s^{-1}\)) is:
\[ FC = PPFD \times Conversion\ Factor \]
Where:
PPFD (Photosynthetic Photon Flux Density) is a measure of the number of photons in the photosynthetically active radiation (PAR) range that are incident on a surface every second.
Foot-candles (FC) is a measure of illuminance, the total amount of visible light illuminating a point on a surface.
Let's assume the following values:
Using the formula:
\[ FC = 100 \times 5.01 \]
Evaluating:
\[ FC = 501 \]
The Foot-candles (FC) is 501.
| Light Type | Conversion Factor |
|---|---|
| Sunlight | 5.01 |
| Fluorescent | 6.87 |
| Mogul HPS | 7.62 |
| DE 1000W HPS | 7.11 |
| MH | 6.6 |
| Philips 315 ARgo 3100K CMH | 5.45 |
| Philips 315 4200K CMH | 6.01 |