condition mean min max 4 h after light 0.151369 0.10039 0.202348 8 h after light 0.054892 0.0 0.109784 12 h after light 0.2002255 0.0 0.400451 4 h after dark 1.580118 0.710146 2.45009 8 h after dark 1.52704 1.31551 1.73857 12 h after dark 0.817878 0.690729 0.945027