condition mean min max 4 h after light 20.1593 19.3553 20.9633 8 h after light 19.006549999999997 18.296 19.7171 12 h after light 19.63745 19.4619 19.813 4 h after dark 29.770649999999996 27.3051 32.2362 8 h after dark 22.874699999999997 22.5917 23.1577 12 h after dark 21.71395 20.5146 22.9133