condition	mean	min	max
4 h after light	18.633433	18.608106	18.65876
8 h after light	17.705655	17.250953	18.160357
12 h after light	17.642827	17.444536	17.841118
4 h after dark	20.285308999999998	17.338024	23.232594
8 h after dark	16.501722	15.364467	17.638977
12 h after dark	13.451862	13.451862	13.451862