condition	mean	min	max
4 h after light	8.19735	8.04267	8.39252
8 h after light	8.163043333333334	7.63894	8.51561
12 h after light	8.121676666666668	7.8743	8.25327
4 h after dark	7.8827766666666665	7.359189999999999	8.211210000000001
8 h after dark	8.283746666666667	7.851839999999999	8.57732
12 h after dark	8.234390000000001	7.78892	8.657160000000001