Table 3 Cumulative energy requirement (ER) for a dry weight formation of 2500 g m−2 during a crop growth cycle of 100 days for plants growing in an indoor system under a the PA/OA scenarios as described in Table 1

From: Estimating the quantum requirements for plant growth and related electricity demand for LED lighting systems

ER PA a + b Φ fabs Φ + fabs OA
kWh m−2 606 458 437 489 353 265
  1. Calculations were based on COEff of the a combination of deep red and blue LEDs with a red:blue photon ratio of 5:1 (Osram Opto Semiconductors GmbH & Co., Regensburg, Germany) (see Table 2)
  2. a, b quantum requirements, Φ the ratio of oxygenation to carboxylation, fabs the fraction of light absorbed by leaves