condition mean min max 4 h after light 6471.11 5633.546667 7441.043333 8 h after light 4975.343889 4121.695 6142.506667 12 h after light 2229.34 1665.866667 3144.33 1.5 h after dark 1361.4233336666666 1020.356667 1655.686667 5.5 h after dark 2378.728889 1881.04 3198.656667 9.5 h after dark 4825.354444333333 4034.16 5865.87