condition	mean	min	max
4 h after light	6.34251	6.16489	6.60053
8 h after light	6.244466666666667	6.1346	6.40796
12 h after light	6.169393333333333	6.06232	6.34157
4 h after dark	6.379353333333333	6.15603	6.630489999999999
8 h after dark	6.277299999999999	6.16961	6.381819999999999
12 h after dark	6.580173333333334	6.2264	7.097180000000001