Table 1.
Main features of the lamps used in the experiments.
| LAMP | Model, supplier | PPFD | Spectrum |
Energy used | PPNE | Tj-Blue | Tj-red | ||
|---|---|---|---|---|---|---|---|---|---|
| (μmol m−2 s−1) | Red (%) | Blue (%) | R:B ratio | (W m−2) | μmol J−1 | °C | °C | ||
| RB0.5 | Flygrow0.5, Flytech | 215 | 30 | 58 | 0.5 | 154 | 1.40 | 61 | 50 |
| RB1 | Flygrow1, Flytech | 215 | 46 | 44 | 1 | 172 | 1.25 | 62 | 53 |
| RB2 | Flygrow2, Flytech | 215 | 62 | 30 | 2 | 210 | 1.02 | 65 | 65 |
| RB3 | Flygrow3, Flytech | 215 | 70 | 23 | 3 | 219 | 0.98 | 65 | 65 |
| RB4 | Flygrow4, Flytech | 215 | 75 | 19 | 4 | 219 | 0.98 | 65 | 70 |
| CK1 | TL-D90 De Luxe 950, Philips | 215 | 29 | 31 | 1 | 386 | 0.55 | – | – |
Photosynthetic Photon Flux Density (PPFD), spectral properties, energy used, photosynthetic photon number efficacy (PPNE), expressed as the ratio between the PPFD supplied (μmol m−2 s−1) and the electric energy consumed (J m−2), and calculated junction temperatures (Tj) of the diodes are reported.