condition	mean	min	max
4 h after light	15.06655	14.0093	16.1238
8 h after light	13.6165	12.7856	14.4474
12 h after light	13.2427	12.4806	14.0048
4 h after dark	16.9615	15.8355	18.3627
8 h after dark	18.831333333333333	18.0241	19.7213
12 h after dark	19.586766666666666	19.0639	19.961