condition mean min max 4 h after light 1044.990169 1028.935861 1061.044477 8 h after light 985.9272475 842.001288 1129.853207 12 h after light 1099.1830439999999 1074.732057 1123.634031 4 h after dark 1139.0139405 1054.872747 1223.155134 8 h after dark 1149.4743755 1082.942728 1216.006023 12 h after dark 902.6145 902.6145 902.6145