Plant lighting PAR, PPF, PPFD description and application testing equipment description

Plant lighting PAR, PPF, PPFD description and application testing equipment description

Sunlight is essential for plants, because plants need to rely on sunlight for photosynthesis. We all know that sunlight is a light source with a continuous spectrum, and photosynthesis of plants is mainly carried out in the visible spectrum range. With the advancement of science and technology, people gradually produce corresponding standard light sources according to the continuous spectral characteristics of natural light. According to the growth characteristics of plants, people gradually produce plant light sources that can replace natural light to promote the photosynthesis of plants. However, the produced plant lights are not necessarily consistent with natural light, so how to evaluate the characteristics of plant light sources, luminous flux, illuminance , Candlelight These parameters have become outdated indicators for determining the light requirements for plants. Recently, people began to apply the PAR, PPFD method to measure photosynthesis in light lighting applications.

What is PAR?
Generally speaking, the level of PAR value in the light output of LED lamps is relatively high. PAR (Photosynthetically Active Radiation) is a term often used for photosynthetically active radiation. It defines the type of light (which we call photoelectromagnetic radiation) that plant life needs to support photosynthesis. Through photosynthesis, plants convert light energy into chemical energy.

Defines Radiation for Photosynthesis (PAR), which is not a measurement or measure, like feet, inches or kilograms. PAR defines the type of light needed to support photosynthesis in plant life. The growth rate of organisms is directly affected by light exposure , Ultraviolet light with a wavelength of 300~400nm and near-infrared light (far-red light) with a wavelength of 700~800nm will affect the biochemical reaction and appearance of organisms. Especially in the light of 400~700nm, there is a close relationship with the photosynthesis of plants and algae, Light in this spectrum is called Photosynthetically Active Radiation (PAR).

What is PPFD?
Photosynthetic Photon Flux Density (Photosynthetic Photon Flux Density) Corresponding to PPF is the number of micromoles radiated by the light source per second per square meter, in umol/m2s, which is the concept of density. Photosynthetic Photon Flux Density (PPFD), measurement Light (photons) reaching a target every second. Photons are the name physicists give to particles of light. Natural or artificial light can be used to facilitate photosynthesis in plant life.

Can test PAR, PPFD, OHSP350P handheld CCD photometer spectrometer, fully meet CIE-13.3, CIE-177, Optical Engineering-49-3-033602 and IEEEstd1789 standards.

Hangzhou Hopoo Light&Color Technology Co., Ltd. focuses on the production, research and development and sales of lighting and electrical testing instruments. The whole series of products are developed and produced in strict accordance with the requirements of ISO9001:2015; all products meet the requirements of CIE; in addition, All products of hopoocolor have passed CE certification and obtained the qualification to export to the European Union. The main products include goniophotometer, integrating sphere, spectroradiometer, illuminometer, colorimeter, and LED test instruments. 

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