condition	mean	min	max
4 h after light	19.2671	19.084893	19.449307
8 h after light	19.789441500000002	19.084893	20.49399
12 h after light	19.17951	18.243605	20.115415
4 h after dark	18.86781	18.064708	19.670912
8 h after dark	19.3347015	19.084893	19.58451
12 h after dark	15.002556	15.002556	15.002556