condition	mean	min	max
4 h after light	3.9168933333333333	3.8698	3.9806800000000004
8 h after light	4.045593333333334	3.9811199999999998	4.08448
12 h after light	4.04662	3.99421	4.11351
4 h after dark	4.02662	3.99286	4.07239
8 h after dark	4.084693333333334	3.9694300000000005	4.15224
12 h after dark	4.086963333333333	3.9430300000000003	4.365530000000001