condition mean min max 0 h after light 1.88352 1.71942 2.04762 4 h after light 2.886845 2.36842 3.40527 8 h after light 1.836205 1.64586 2.02655 4 h after dark 2.48576 2.08703 2.88449 8 h after dark 2.99138 2.70696 3.2758 12 h after dark 2.275535 1.75308 2.79799