Fig. 1. Spectral photon flux distributions for the lighting treatments. (A) White fluorescent lamp (FL); (B) green light-emitting diodes (LEDs); G510: peak wavelength 510 nm, G520: peak wavelength 524 nm, G530: peak wavelength 532 nm. Total photosynthetic photon flux was 100 mol m−2 s−1 in each treatment. Spectral scans of LED light were recorded 20 cm below the panel of LEDs and 45 cm below the FL.