condition	mean	min	max
4 h after light	8.48515	8.44903	8.52544
8 h after light	8.441213333333334	8.36425	8.520010000000001
12 h after light	8.536186666666667	8.4686	8.6399
4 h after dark	8.75236	8.64071	8.81926
8 h after dark	8.484883333333332	8.31339	8.57987
12 h after dark	8.711926666666667	8.632530000000001	8.8389