Circadian clock action spectrum in a photoperiodic moth.
A circadian rhythm of egg hatching in the moth Pectinophora gossypiella can be initiated with a brief light pulse. The action spectrum for this effect has a peak in the blue and near ultraviolet region of the spectrum with a sharp cutoff above 500 nanometers and a more gradual cutoff below 390 nanometers.
Bruce
V G
VG
Minis
D H
DH