condition	mean	min	max
4 h after light	13.5306	12.734	14.3272
8 h after light	7.14942	6.81925	7.47959
12 h after light	5.664115	5.33318	5.99505
4 h after dark	16.0429	15.3747	16.7111
8 h after dark	18.873350000000002	18.422	19.3247
12 h after dark	19.429850000000002	18.6117	20.248