condition mean min max 4 h after light 3.956325 3.88858 4.02407 8 h after light 3.79026 3.65657 3.92395 12 h after light 2.26567 1.77591 2.75543 4 h after dark 2.8239400000000003 2.36201 3.28587 8 h after dark 2.3250200000000003 2.3142 2.33584 12 h after dark 3.9290399999999996 3.38503 4.47305