condition	mean	min	max
4 h after light	7.193253333333334	7.163410000000001	7.23124
8 h after light	6.98321	6.87898	7.08598
12 h after light	6.991183333333333	6.91781	7.076639999999999
4 h after dark	6.68382	6.54873	6.82154
8 h after dark	6.8541566666666665	6.790439999999999	6.90896
12 h after dark	7.00823	6.912030000000001	7.07118