condition	mean	min	max
0 h after light	9.316715	9.15459	9.47884
4 h after light	19.08965	18.7472	19.4321
8 h after light	20.8734	20.1067	21.6401
4 h after dark	18.15205	17.741	18.5631
8 h after dark	14.00505	13.8112	14.1989
12 h after dark	14.0226	12.1869	15.8583