DLI - daily light integral

Graph showing the amount of light provided by the sun for one year in a greenhouse.

Daily Light Integral describes the number of photosynthetically active photons (in the PAR range 400-700nm) that are delivered for a given area within 24h. This indicator is very important because the amount of light received by plants has a direct impact on the growth, speed of development and quality of the crop. Depending on the species and type of plant, the light requirement is different.

Artificial LED lighting can be used to increase DLI in times when natural light is less. The result will be an extension of the productive period of the crops.

Knowing what DLI the plant needs allows you to determine how much additional light is needed to achieve the optimal amount. DLI monitors are used to obtain the most accurate results. It is a quantum light sensor, linked to a device that records the results and can be used to calculate the DLI.

“DLI is the amount of light that reaches plants per day.”

See also!

Optical radiation and the light spectrum
Optical radiation and the light spectrum

Light as visible radiation, its division and influence on the plant.

PAR chart
Why is light so important to plants?

What is necessary for the proper functioning of plants? Is all light good?

Chlorophylls and their absorption spectrum

Why are the leaves green? Color perception and how it relates to light absorption.

PPF and PPFD - the most important parameters of your lighting

What do plants eat? What do the two most important parameters in plant lighting mean?

Supplementation of red and blue light

Red and blue are the colors most absorbed by plants to support photosynthesis.

Suplementacja w szklarni
Light supplementation in the greenhouse.

How to illuminate crops when they already have access to daylight.

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