condition mean min max 4 h after light 5.7331 5.70751 5.783930000000001 8 h after light 5.877326666666667 5.82048 5.915719999999999 12 h after light 5.756016666666667 5.72501 5.77686 4 h after dark 5.758166666666667 5.6256 5.90677 8 h after dark 5.92382 5.76704 6.023219999999999 12 h after dark 5.75917 5.598319999999999 5.88375