condition	mean	min	max
4 h after light	4.134943333333333	4.1292	4.139959999999999
8 h after light	4.06947	4.01464	4.10743
12 h after light	4.059863333333333	4.05485	4.0681
4 h after dark	4.13382	4.132630000000001	4.13501
8 h after dark	4.031226666666667	3.9357900000000003	4.10384
12 h after dark	4.013023333333333	3.85793	4.13084