condition mean min max 0 h after light 1.56395 1.56256 1.56534 4 h after light 2.77319 2.12284 3.42354 8 h after light 4.653115 4.1532 5.15303 4 h after dark 4.697905 4.45089 4.94492 8 h after dark 4.20803 3.93281 4.48325 12 h after dark 2.08228 1.47377 2.69079