condition	mean	min	max
4 h after light	19.24815	18.238	20.2583
8 h after light	14.575	13.9197	15.2303
12 h after light	9.38677	9.2995	9.47404
4 h after dark	11.215433333333333	10.6881	11.8461
8 h after dark	10.4168	9.9709	10.9668
12 h after dark	16.399366666666666	15.0158	18.7476