condition	mean	min	max
4 h after light	21.58115	19.2803	23.882
8 h after light	13.9588	13.889	14.0286
12 h after light	13.3153	12.7062	13.9244
4 h after dark	11.97775	11.4564	12.4991
8 h after dark	11.9848	11.6705	12.2991
12 h after dark	16.35345	15.7097	16.9972