condition	mean	min	max
4 h after light	8.0672	8.00345	8.18253
8 h after light	8.17052	8.076839999999999	8.24146
12 h after light	8.081723333333333	7.95838	8.20974
4 h after dark	8.121083333333333	8.116430000000001	8.130230000000001
8 h after dark	8.091926666666666	7.96028	8.1824
12 h after dark	8.163183333333333	8.11928	8.239289999999999