condition	mean	min	max
4 h after light	6.274	6.10789	6.5149099999999995
8 h after light	6.16746	6.01492	6.392580000000001
12 h after light	5.945743333333333	5.74735	6.196219999999999
4 h after dark	6.053403333333333	5.89412	6.33972
8 h after dark	5.954996666666666	5.517440000000001	6.179209999999999
12 h after dark	6.134213333333333	5.74295	6.60819