condition	mean	min	max
4 h after light	6.780290000000001	6.36096	7.19962
8 h after light	2.34082	2.07755	2.60409
12 h after light	5.964785	5.9115	6.01807
4 h after dark	13.84985	13.3066	14.3931
8 h after dark	18.5014	17.7103	19.2925
12 h after dark	15.391300000000001	15.2119	15.5707