condition mean min max 4 h after light 3925.337713 3311.462826 4539.2126 8 h after light 3063.6395805 2900.830316 3226.448845 12 h after light 3508.6289085 3288.395143 3728.862674 4 h after dark 3095.9050655 2796.945703 3394.864428 8 h after dark 2413.8280825 1802.213869 3025.442296 12 h after dark 4927.49885 4927.49885 4927.49885