condition mean min max 4 h after light 0.0 0.0 0.0 8 h after light 0.0 0.0 0.0 12 h after light 0.0 0.0 0.0 4 h after dark 0.2406045 0.238878 0.242331 8 h after dark 0.2992705 0.0 0.598541 12 h after dark 0.415528 0.235705 0.595351