condition	mean	min	max
4 h after light	18.0278	15.1469	20.9087
8 h after light	28.26525	27.3349	29.1956
12 h after light	31.50245	31.147	31.8579
4 h after dark	36.54195	35.7968	37.2871
8 h after dark	25.9433	24.8606	27.026
12 h after dark	22.52835	21.7909	23.2658