condition	mean	min	max
4 h after light	7.805906666666667	7.69075	7.87706
8 h after light	8.03095	7.781610000000001	8.17488
12 h after light	7.7788	7.66904	7.971610000000001
4 h after dark	8.11419	7.71443	8.4936
8 h after dark	8.232796666666665	7.90827	8.51325
12 h after dark	8.03025	7.8886	8.204310000000001