condition	mean	min	max
4 h after light	6.176903333333334	6.0083	6.28953
8 h after light	6.019373333333333	5.94728	6.0576
12 h after light	5.95045	5.64468	6.24019
4 h after dark	6.162266666666667	6.0841	6.2335400000000005
8 h after dark	5.8465300000000004	5.69448	6.07386
12 h after dark	5.980113333333334	5.90573	6.0734