During investigation it was determined that the dry weight of cucumber trans-
plants roots under high-power solid-state lighting modules were significantly greater
than under “SON-T Agro” lamps (Fig. 8). It was established that leaves and stems of
cucumber transplants under module with supplemental green 520 nm LEDs had signi-
ficantly greater dry weight. Total dry weight was also higher in these plants. A little less
of total dry weight had cucumber transplants under modules with the main set of LEDs
and under module with supplemental orange 622 nm LEDs. The total dry weight in
plants under “SON-T Agro” lamps and under modules with supplemental UV and
orange LEDs was less than in above mentioned cucumber transplants (Fig. 8).