condition	mean	min	max
4 h after light	3.9599466666666667	3.8898900000000003	4.04058
8 h after light	3.9781666666666666	3.95992	3.99749
12 h after light	3.9530600000000002	3.9071599999999997	4.0361400000000005
4 h after dark	3.9298333333333337	3.8884800000000004	3.9618800000000003
8 h after dark	3.88784	3.78813	3.94025
12 h after dark	3.9445666666666668	3.9171199999999997	3.9890800000000004