Photosynthetically Active Radiation

Photosynthetically Active Radiation (PAR) refers to the spectral range of solar radiation from 400 to 700 nanometers that is used by plants for photosynthesis. PAR is an important parameter in designing and operating plant growth facilities in space, as it directly affects plant growth and productivity. PAR can be measured using specialized sensors, such as quantum sensors, which provide accurate measurements of the amount of PAR available for photosynthesis. In space, PAR can be manipulated using artificial lighting systems, such as light-emitting diodes (LEDs), to provide optimal growing conditions for plants. Understanding and controlling PAR is crucial for sustainable food production in space and for future long-duration space missions.
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