condition	mean	min	max
4 h after light	18.003149999999998	16.8984	19.1079
8 h after light	17.4008	16.8244	17.9772
12 h after light	18.60555	17.8456	19.3655
4 h after dark	19.78725	18.2384	21.3361
8 h after dark	20.115099999999998	20.0113	20.2189
12 h after dark	21.41965	21.3134	21.5259