condition	mean	min	max
4 h after light	6.644080000000001	6.487	6.8456600000000005
8 h after light	6.783253333333334	6.484030000000001	7.22107
12 h after light	6.634223333333333	6.21314	6.932989999999999
4 h after dark	6.46353	6.30599	6.76123
8 h after dark	6.015043333333334	5.78115	6.28367
12 h after dark	5.814853333333334	5.64046	6.01745