condition	mean	min	max
4 h after light	18.20535	16.2926	20.1181
8 h after light	15.35105	14.3714	16.3307
12 h after light	14.83795	13.259	16.4169
4 h after dark	16.87995	15.3829	18.377
8 h after dark	16.2215	15.6431	16.7999
12 h after dark	19.561100000000003	19.3896	19.7326