condition mean min max 4 h after light 2.95851 2.86498 3.05204 8 h after light 4.059055 3.90721 4.2109 12 h after light 3.15021 3.14799 3.15243 4 h after dark 4.815165 4.79854 4.83179 8 h after dark 3.4644399999999997 3.45311 3.47577 12 h after dark 4.025905 3.8792 4.17261