Figure 1
Relative spectral power distributions of the light sources used in the experiment.
Figure 2
Average melatonin concentrations (pg/ml ± S.E.M.) under the Hg lighting condition.
Figure 3
Average melatonin concentrations (pg/ml ± S.E.M.) under the LED lighting condition.
Figure 4
Melatonin suppression (mean ± S.E.M.) for sessions 1 and 2 for each lighting condition (Hg and LED).
Figure 5
Relative pupil area (calculated as a proportion of the iris area, normalized to unity, ± S.E.M.) for sessions 1 and 2 for each lighting condition (Hg and LED).