condition	mean	min	max
4 h after light	8.363193333333333	8.05374	8.55092
8 h after light	8.130253333333334	7.76479	8.37926
12 h after light	8.29349	8.01868	8.43351
4 h after dark	8.33633	8.223289999999999	8.47265
8 h after dark	8.39656	8.17338	8.5084
12 h after dark	8.285886666666666	7.96484	8.476519999999999