condition	mean	min	max
4 h after light	13.61481	8.09223	16.9073
8 h after light	9.975806666666665	3.21642	15.4515
12 h after light	12.507586666666667	8.24826	18.8141
4 h after dark	18.5822	15.4329	21.2132
8 h after dark	20.1622	16.8709	23.318
12 h after dark	21.0596	19.997	21.8159