condition	mean	min	max
4 h after light	17.978050000000003	16.263	19.6931
8 h after light	14.803	14.6342	14.9718
12 h after light	17.9341	16.299	19.5692
4 h after dark	16.7954	16.0557	17.5351
8 h after dark	19.86345	19.825	19.9019
12 h after dark	19.052950000000003	19.0164	19.0895