condition	mean	min	max
4 h after light	7.562123333333334	7.38353	7.689660000000001
8 h after light	7.627870000000001	7.517189999999999	7.695110000000001
12 h after light	7.46917	7.37512	7.51743
4 h after dark	7.39586	7.33132	7.49435
8 h after dark	7.51619	7.499439999999999	7.54362
12 h after dark	7.599613333333333	7.49435	7.67117