condition	mean	min	max
4 h after light	19068.13	17035.67333	20507.85667
8 h after light	19766.692223333335	17611.01667	22635.4
12 h after light	18043.407776666667	15904.36	22072.97333
1.5 h after dark	16376.6	14194.25	18830.88667
5.5 h after dark	16715.24111	14068.48667	19458.57333
9.5 h after dark	17187.14777666667	16171.88333	17975.76667