Table 5.

Studies showing the possibility of influencing the quality and quantity of microgreens with the help of artificial lighting systems.

No.	Reference	Investigation Context	Results
1	Kim et al., 2016 [85]	Reported that there is a potential for LED light in the UV and blue ranges to enhance food safety of hydroponically grown microgreens by treating the water as it circulates.	Light in blue and UV wavelengths is able to kill bacteria. Regardless of the bacterial strain, the sensitivity of illuminated bacterial cells to bile salts and NaCl considerably increased compared to non-illuminated controls.
2	Samuolienė et al., 2016 [86]	Evaluate the role of 638 and 665 nm red light components on quantitative changes in antioxidants and to assess the effect of light quality on the antioxidative status of basil and parsley.	Red spectrum (638 nm) can improve its antioxidant properties, while blue light improves the yield of other phytochemicals related to high-quality products. Increased or supplemental red light significantly increased contents of phenolics, α-tocopherol and ascorbic acid.
3	Lobiuc et al., 2017 [87]	Different ratios of LED blue and red illumination; 4 light treatments were 100% white (White) and various red (R) to blue (B) ratios, as follows: 2R:1B, 1R:1B and 1R:2B, intensities	Growth of microgreens was enhanced with predominantly blue illumination, larger cotyledon area and higher fresh mass. The same treatment elevated chlorophyll a and anthocyanin pigments contents.
4	Zhang et al., 2020 [88]	Effects of light-emitting diode (LED) light on growth, phytochemical compound content and antioxidant capacity, as well as the post-harvest quality of sprouts and microgreens were investigated.	LED light can promote the accumulation of different phytochemicals, such as phenolic compounds, vitamins, glucosinolates, chlorophyll and carotenoids. Meanwhile, the antioxidant capacity could also be significantly increased by growth under LED light, in particular UV-B light. The accumulation of mineral elements (Ca2+, Fe2+, K+) increased after light exposure.
5	Artés-Hernández et al., 2022 [89]	Use of UV and visible spectrum LED lighting to improve the quality of microgreens to enhance their health-promoting compounds.	Illumination with UV and/or different regions of the visible spectrum during growing and shelf life are good abiotic elicitors of the production of phytochemicals in young plants, mainly through the activation of specific photoreceptors.