condition mean min max 0 h after light 1.37537 1.37414 1.3766 4 h after light 2.409475 2.2185 2.60045 8 h after light 2.8495100000000004 2.66279 3.03623 4 h after dark 2.470955 2.33928 2.60263 8 h after dark 1.743655 1.63772 1.84959 12 h after dark 1.53623 1.33421 1.73825