condition mean min max 4 h after light 0.600067 0.447865 0.752269 8 h after light 1.354485 1.15803 1.55094 12 h after light 1.670235 1.56319 1.77728 4 h after dark 2.128625 1.98008 2.27717 8 h after dark 2.486775 1.6805 3.29305 12 h after dark 1.721345 1.60495 1.83774