condition	mean	min	max
4 h after light	18.34685	17.75	18.9437
8 h after light	16.2805	16.0254	16.5356
12 h after light	19.436349999999997	19.3678	19.5049
4 h after dark	19.659950000000002	19.2192	20.1007
8 h after dark	21.98655	21.1323	22.8408
12 h after dark	21.70965	20.285	23.1343