condition mean min max 0 h after light 0.0 0.0 0.0 4 h after light 0.0 0.0 0.0 8 h after light 0.084885 0.0 0.16977 4 h after dark 0.0 0.0 0.0 8 h after dark 0.0845015 0.0 0.169003 12 h after dark 0.0 0.0 0.0