condition	mean	min	max
4 h after light	6.628965	5.76562	7.49231
8 h after light	8.17713	7.84388	8.51038
12 h after light	8.42484	8.08627	8.76341
4 h after dark	20.6781	17.5496	23.7102
8 h after dark	14.2173	11.5499	16.356
12 h after dark	11.364466666666667	10.2946	13.2192