The formula to calculate Foot-candles (FC) from PPFD (\(\mu mol m^{-2} s^{-1}\)) is:

\[ FC = PPFD \times Conversion\ Factor \]

Where:

- \(FC\) is the illuminance in foot-candles.
- \(PPFD\) is the Photosynthetic Photon Flux Density.
- Conversion Factor depends on the type of light source.

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:

- PPFD = 100
- Light Type = Sunlight

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 |