condition	mean	min	max
4 h after light	18.64885	17.293	20.0047
8 h after light	7.194905	7.1441	7.24571
12 h after light	8.361004999999999	6.94628	9.77573
4 h after dark	8.14627	8.03694	8.2556
8 h after dark	11.636	11.6136	11.6584
12 h after dark	15.0245	14.6703	15.3787