condition	mean	min	max
4 h after light	14.222993333333333	9.41958	18.347
8 h after light	15.64524	7.10302	22.1968
12 h after light	19.508766666666666	14.48	23.7559
4 h after dark	21.6809	18.0908	25.1724
8 h after dark	20.4389	17.0712	23.6
12 h after dark	20.6036	19.2169	21.9526