PAR designates the spectral range (or wave band) of light radiation that photosynthetic organisms can use in the process of photosynthesis. The range moves from 400 to 700 nanometers.
PPF (Photosynthetic Photon Flux)
The first measurement is Photosynthetic Photon Flux or “PPF” which measures the total amount of light that is produced by a light source each second. PPF measures the “photosynthetically active photons emitted by a lighting system per second”. This measurement is expressed in micromoles per second, or μmol/second. Note though, that PPF does not tell us how much of the measured light actually lands on the plants or any other surface. PPF is expressed as: μmol/second.
PPFD (Photosynthetic Photon Flux Density)
The second measurement is PPFD which measures the light that actually arrives at the plant. Photosynthetic Photon Flux Density or PPFD is a measurement of the number of photons in the 400-700nm range of the visible light spectrum (PAR) that fall on a square meter of target area per second. PPFD is a spot measurement of a specific location on your plant canopy, and it is measured in micromoles per square meter per second. PPFD is expressed as: μmol/m2/s.
DLI (Daily Light Integral)
The third measurement is DLI (Day Light Integral) which measures the total amount of light that is delivered to a plant every day. The DLI is a cumulative measurement of the total number of photons that reach the plants during the daily photoperiod. In other words, it is the plant’s daily dose of light. DLI measures the number of moles of photons per square meter per day and is expressed as: mol/m2/d. DLI is one of the most important metric for determining the overall growth rate of plants. Once you know the preferred DLI of your plants, you can choose the right ClimaLED lighting system to deliver the required amount of light, or just ask us!
A mole is a unit used in chemistry for measuring large quantities of very small entities such as atoms, molecules, or other specified particles and is equal to “Avogadro’s number”, 6.02214179 × 1023, which is the number of atoms found in 12 grams of carbon-12.
One millionth of a mole.
the name physicists give to light particles.
The period of time during which natural or artificial light is available to promote photosynthesis in plant life each day.
A small area or region with a relatively hot temperature in comparison to its surroundings.
Full Spectrum Light
Light that covers the electromagnetic spectrum from infrared to near-ultraviolet, or all wavelengths that are useful to plant life.
Design approach that focuses on heat gain control and heat dissipation in, this case, a lamp in order to keep lights cool with low or nil energy consumption.
The area covered by a lighting system.
The process by which a plant grows from a seed resulting in the formation of a seedling.
The period of growth between germination and the beginning of sexual maturity characterised by flowering. During this stage a plant will be photosynthesising as much as possible to grow as large as it can before the onset of the flowering (Generative) phase.
The period in which plants flower/produce buds.