Photosynthetically Active Radiation (PAR)

Gamma Scientific has been a leading expert in total spectral flux and flux density measurements for over 10 years. As an ISO 17025 accredited laboratory with standards traceable to NIST (National Institute of Standards and Technology) we can test any of your Horticulture lighting system needs.

Photosynthetically Active Radiation (PAR) consists of light measured from a range of 400nm to 700nm. This radiation drives photosynthesis and is important in many LED Grow Light applications. PAR can be measured in Photosynthetic Photon Flux (PPF) and Photosynthetic Photon Flux Density (PPFD).

Photosynthetic Photon Flux (PPF)

Photosynthetic Photon Flux is a measurement which captures the total radiated energy of a light source, and is reported as (umol/sec). The PPF is a metric used by horticulturists to determine total output of a light, as well as to calculate the efficacy of certain lighting setting in regards to PAR.

Photosynthetic Photon Flux Density (PPFD)

Photosynthetic Photon Flux Density (PPFD) is used in conjunction with PPF to determine the amount of photosynthetically active photons that land on a certain area of the surface of the plant canopy per second (umol/m2/sec). This is an important measurement, in which the actual intensity of light is measured over a certain area. Horticulture lighting system needs.

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