condition	mean	min	max
4 h after light	6.80205	6.77907	6.82298
8 h after light	6.265783333333333	6.1961	6.36602
12 h after light	7.042386666666666	6.88214	7.2427399999999995
4 h after dark	7.33178	7.27493	7.37631
8 h after dark	7.0891166666666665	6.975219999999999	7.159860000000001
12 h after dark	6.9108366666666665	6.664389999999999	7.179639999999999