condition	mean	min	max
4 h after light	7.023083333333334	6.9302600000000005	7.185810000000001
8 h after light	7.055986666666667	6.8067899999999995	7.24569
12 h after light	7.145243333333333	6.9855	7.2828
4 h after dark	7.0958000000000006	7.068110000000001	7.149430000000001
8 h after dark	6.890463333333333	6.85177	6.95275
12 h after dark	6.9896400000000005	6.758710000000001	7.19998