Previous studies demonstrated that both light intensity and spectral composition of light impact on brain functioning and regulate circadian rhythms. Further, several studies have shown that light exposure, especially blue light (about 460 nm), has positive effects on alertness, vigilance, mood, also increasing mental performance and work productivity. Unfortunately, results have not been always consistent.
LED is a promising light source for the cultivation of edible vegetables in greenhouses. The spectral radiation of the light sources has an impact on plants physiological parameters as well as on morphological features . In this study the growth of spinach plants has been carried out in experimental boxes under two white LED treatments having different CCT (CL = 6500 K, WL = 3000 K) with the aim of investigating the influence of the two light spectra on plant development and comparing the results.
Light-emitting diodes (LED) are a promising light source for the cultivation of edible vegetables in greenhouses. The spectral radiation of the light sources has an impact on plants physiological parameters, as well as on morphological features. In this study the growth of spinach plants has been carried out in experimental boxes under two white LED treatments having different correlate color temperature (CCT): the cold lighting (CL) corresponded to 6500 K, while the warm lighting (WL) to 3000 K.
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