condition	mean	min	max
0 h after light	4.641685	4.06555	5.21782
4 h after light	8.117265	7.08877	9.14576
8 h after light	13.34985	11.213	15.4867
4 h after dark	15.11935	14.8043	15.4344
8 h after dark	16.0599	14.8457	17.2741
12 h after dark	4.556165	2.31592	6.79641