condition	mean	min	max
4 h after light	8.36508	8.20606	8.57727
8 h after light	8.33443	8.11539	8.56683
12 h after light	8.562066666666666	8.306410000000001	8.818439999999999
4 h after dark	8.567663333333334	8.36385	8.67136
8 h after dark	8.350433333333333	8.231060000000001	8.580969999999999
12 h after dark	8.28583	8.2456	8.32588