condition	mean	min	max
4 h after light	16.55985	15.3227	17.797
8 h after light	12.94255	12.6861	13.199
12 h after light	14.90695	13.3686	16.4453
4 h after dark	18.3554	17.0561	19.6547
8 h after dark	16.89655	16.0084	17.7847
12 h after dark	19.572000000000003	18.512	20.632