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. Author manuscript; available in PMC: 2018 Aug 1.
Published in final edited form as: Physiol Behav. 2017 May 1;177:221–229. doi: 10.1016/j.physbeh.2017.05.002

Figure 2. Effects of spectral tuning on pre-bed melatonin suppression.

Figure 2

Melatonin secretion related outcome measures included the time course of melatonin secretion profiles during the 6-h constant posture interval under C-LED (black line), FL (gray line) and dim light (gray dashed line) (A), melatonin area under the curve (AUC) secretion during the 6-h CP under C-LED and FL conditions (B), and melatonin suppression calculated as the difference in the AUC during the 6-h CP interval of the light exposure adjusted to the corresponding dim-light control interval 24 h earlier (C). Data are expressed as group means ± SEM. * p<0.05; between lighting conditions.