Table 2 Ratios of any two colors relative to the photosynthetic photon flux density (PPFD) of each light source. Far red (FR, 701–780 nm), red (R, 600–700 nm), green (G, 500–599 nm), blue (B, 400–499 nm), and ultraviolet-A (UV-A, 380–399 nm)
Light | R/FR | G/FR | B/FR | UV-A/FR | R/G | R/B | R/UV-A | G/B | G/UV-A | B/UV-A |
|---|---|---|---|---|---|---|---|---|---|---|
LED 1 | 11.50 | 3.51 | 1.74 | 0.01 | 3.28 | 6.62 | 1628.78 | 2.02 | 496.78 | 246.22 |
LED 2 | 4.45 | 2.11 | 1.88 | 0.01 | 2.11 | 2.37 | 943.08 | 1.12 | 447.00 | 398.58 |
LED 3 | 10.29 | 10.78 | 3.97 | 0.03 | 0.95 | 2.59 | 354.80 | 2.72 | 371.84 | 136.84 |
LED 4 | 8.72 | 15.16 | 9.13 | 0.02 | 0.58 | 0.96 | 434.85 | 1.66 | 755.46 | 455.31 |
HPS | 5.18 | 5.37 | 0.61 | 0.03 | 0.96 | 8.47 | 193.08 | 8.78 | 200.29 | 22.81 |