condition	mean	min	max
0 h after light	7.786645	7.21685	8.35644
4 h after light	6.89091	6.11195	7.66987
8 h after light	6.907875	6.58306	7.23269
4 h after dark	15.91555	13.0711	18.76
8 h after dark	12.73255	11.4495	14.0156
12 h after dark	10.18075	10.0151	10.3464