condition	mean	min	max
0 h after light	8.109975	7.71169	8.50826
4 h after light	9.310205	8.98787	9.63254
8 h after light	13.82885	13.5666	14.0911
4 h after dark	17.77335	16.7784	18.7683
8 h after dark	11.8195	11.5352	12.1038
12 h after dark	8.42112	7.01326	9.82898