Democritus University of Thrace (Greece) together with Wageningen University (the Netherlands) conducted a study on the effects of different wide, continuous LED light spectra on the development of these compounds. The treatment spectra used were:
• High red and high red:far red (AP673L spectrum by Valoya).
• High red and low red:far red (G2 spectrum by Valoya).
• Moderate blue and red and low red:far red (AP67 spectrum by Valoya).
• High blue and green, high red:far red and one per cent ultraviolet (NS1 spectrum by Valoya).
• Conventional white fluorescent lights were used as control.
Basil seedlings were exposed to control and treatment light spectra for 28 days in an environmentally controlled growth chamber. After this period, Total Phenolic Content (TPC) was measured by using the Folin-Ciocalteau colorimetric assay with gallic acid as calibration standard, by a UV-vis spectrophotometer.
Of all the used spectra, NS1 resulted in highest TPC, followed by AP673L, AP67, G2 and with the control in the last place, significantly lower than any of the treatment lights. The NS1 spectrum produced a 3.8 times higher total phenolic content than the control light.
To read the entire study, please click here.
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Valoya is a provider of energy efficient LED grow lights for professional use in plant breeding, seed production, research and vertical farming. Valoya LED lights have been developed using Valoya’s proprietary LED technology and extensive plant photobiology research. Valoya’s customer base includes numerous vertical farms, greenhouses and research institutions all over the world.