condition mean min max 0 h after light 0.730845 0.627077 0.834613 4 h after light 0.106301 0.0 0.212602 8 h after light 0.412861 0.0 0.825722 4 h after dark 0.204924 0.0 0.409848 8 h after dark 0.3082465 0.0 0.616493 12 h after dark 0.618311 0.611503 0.625119