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The ratio of mean measured Pn to mean estimated Pn calculated in different PPFD ranges.
| PPFD range (μmol m–2 s–1) | Measured Pn (μmol m–2 s–1) | Estimated Pn (μmol m–2 s–1) | Measured Pn/estimated Pn |
| 300–500 | 10.4 | 10.8 | 0.95 |
| 500–700 | 12.9 | 13.8 | 0.94 |
| 700–900 | 15.9 | 16.5 | 0.96 |
| 900–1,100 | 18.0 | 18.3 | 0.98 |
| 1,100–1,300 | 19.0 | 19.2 | 0.99 |
| All (300–1,300) | 14.3 | 14.7 | 0.97 |
