condition	mean	min	max
4 h after light	6.394886666666666	6.38176	6.406540000000001
8 h after light	6.52155	6.4411	6.6437100000000004
12 h after light	6.3201133333333335	6.03993	6.55543
4 h after dark	6.41529	6.27436	6.59099
8 h after dark	6.3833866666666665	6.05935	6.69774
12 h after dark	6.41025	6.21711	6.59392