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

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

Where:

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

The formula to calculate the temperature increase (\(\Delta T\)) from PPFD is:

\[ \Delta T = \frac{PPFD}{13} \times 0.5 \]

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.

Lux is a measure of illuminance, the total amount of visible light illuminating a point on a surface.

Let's assume the following values:

- Lux = 1000
- Light Type = Sunlight

Using the formula:

\[ PPFD = 1000 \times 0.0185 \]

Evaluating:

\[ PPFD = 18.5 \]

The PPFD is 18.5 µmol m⁻² s⁻¹.

Using the temperature increase formula:

\[ \Delta T = \frac{18.5}{13} \times 0.5 \]

Evaluating:

\[ \Delta T = 0.71 \]

The temperature increase is 0.71 °C.

Light Type | Conversion Factor |
---|---|

Sunlight | 0.0185 |

Fluorescent | 0.0165 |

Mogul HPS | 0.0122 |

Agro HPS | 0.0130 |

MH | 0.0141 |

Philips 315 ARgo 3100K CMH | 0.0170 |

Philips 315 4200K CMH | 0.0154 |