condition	mean	min	max
4 h after light	6.65311	6.48231	6.92507
8 h after light	6.7987866666666665	6.67369	6.90578
12 h after light	6.580073333333333	6.52701	6.627389999999999
4 h after dark	6.6339033333333335	6.53685	6.684769999999999
8 h after dark	6.7437000000000005	6.53734	6.97965
12 h after dark	6.6351466666666665	6.5921199999999995	6.70287