condition	mean	min	max
4 h after light	18528.3	18528.3	18528.3
8 h after light	18496.45	16385.4	20607.5
12 h after light	16293.15	14927.3	17659.0
4 h after dark	13661.75	12320.2	15003.3
8 h after dark	13857.9	11756.9	15958.9
12 h after dark	15543.7	15382.4	15705.0