condition	mean	min	max
4 h after light	6.7330966666666665	6.5764	6.8779
8 h after light	6.720606666666667	6.38555	7.03445
12 h after light	6.655573333333334	6.28022	7.073580000000001
4 h after dark	6.28038	6.27459	6.28766
8 h after dark	6.1695899999999995	6.05221	6.26366
12 h after dark	5.92759	5.91282	5.94873