condition	mean	min	max
4 h after light	3.9409966666666665	3.9219699999999995	3.97594
8 h after light	3.9329066666666668	3.8673	4.03569
12 h after light	3.9184799999999997	3.85974	4.012
4 h after dark	4.01465	3.96372	4.06429
8 h after dark	4.091383333333333	3.9633800000000003	4.176159999999999
12 h after dark	3.9320566666666665	3.87879	3.96624