condition	mean	min	max
4 h after light	20.72525	17.8523	23.5982
8 h after light	14.56485	13.1682	15.9615
12 h after light	17.17675	16.5893	17.7642
4 h after dark	17.66335	16.456	18.8707
8 h after dark	19.19845	19.0166	19.3803
12 h after dark	20.20765	19.51	20.9053