condition	mean	min	max
4 h after light	6.739515	6.31304	7.16599
8 h after light	3.793165	3.77111	3.81522
12 h after light	4.31381	3.95564	4.67198
4 h after dark	6.11093	6.11083	6.11103
8 h after dark	6.44456	6.38716	6.50196
12 h after dark	7.646545	7.43452	7.85857