condition mean min max 0 h after light 2.84676 2.29822 3.3953 4 h after light 3.444275 3.17906 3.70949 8 h after light 1.95547 1.86822 2.04272 4 h after dark 2.758305 2.7117 2.80491 8 h after dark 2.58527 2.27847 2.89207 12 h after dark 3.0793850000000003 2.88671 3.27206