condition	mean	min	max
4 h after light	8.041193333333332	7.99091	8.12905
8 h after light	8.136596666666666	8.04849	8.20389
12 h after light	8.118730000000001	8.015080000000001	8.24864
4 h after dark	8.322496666666666	8.13353	8.552719999999999
8 h after dark	8.40428	8.29913	8.52612
12 h after dark	8.37567	8.29222	8.45112