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Evaluating Potential Spectral Impacts of Various Artificial Lights on Melatonin Suppression, Photosynthesis, and Star Visibility

Figure 5

Atmospheric scattered Melatonin Suppression Index dependency, with distance between lamp and observer, (a) and (c) for usual street lamps and (b) and (d) for new technologies that reduce light pollution.

The two upper plots (a) and (b) are for clear sky conditions, while (c) and (d) are for cloudy sky conditions.

Figure 5

doi: https://doi.org/10.1371/journal.pone.0067798.g005