condition	mean	min	max
4 h after light	18.111731	15.722454	20.501008
8 h after light	17.6222225	16.119105	19.12534
12 h after light	15.915253	15.711401	16.119105
4 h after dark	18.1253495	16.119105	20.131594
8 h after dark	16.119105	16.119105	16.119105
12 h after dark	15.16662	15.16662	15.16662