condition	mean	min	max
4 h after light	7.5999	6.19718	9.00262
8 h after light	13.600999999999999	13.129	14.073
12 h after light	19.24745	17.9644	20.5305
4 h after dark	21.247799999999998	19.6481	22.8475
8 h after dark	18.325249999999997	18.141	18.5095
12 h after dark	13.9283	13.1207	14.7359