condition	mean	min	max
4 h after light	17.237379	15.489529	18.985229
8 h after light	19.7180915	19.644718	19.791465
12 h after light	22.3369575	19.602456	25.071459
4 h after dark	17.5415705	16.612298	18.470843
8 h after dark	16.1086455	13.660878	18.556413
12 h after dark	22.31399	22.31399	22.31399