condition mean min max 4 h after light 2.637105 2.32206 2.95215 8 h after light 2.40434 2.07284 2.73584 12 h after light 2.465 2.41118 2.51882 4 h after dark 3.9802933333333335 3.56109 4.29117 8 h after dark 2.105026666666667 1.76406 2.34166 12 h after dark 2.44443 1.77014 3.1995