condition	mean	min	max
0 h after light	15.2808	15.1385	15.4231
4 h after light	8.52275	7.67998	9.36552
8 h after light	7.49621	6.97769	8.01473
4 h after dark	12.0311	10.2918	13.7704
8 h after dark	11.01117	9.74774	12.2746
12 h after dark	12.78095	11.8709	13.691