“…There were 42 trials for photosynthesis and a corresponding 42 trials for respiration based on the 7 artificial monochromatic lights (red, orange, yellow, white, green, blue, and violet), 2 lettuce leaf maturities (head development-stage and harveststage), and 3 light source proximities (10, 20, and 30 cm) (Concepcion et al, 2021;Bautista, et al, 2022).…”