condition	mean	min	max
4 h after light	18472.37111	17741.6	19520.21333
8 h after light	21994.48778	18436.42667	24730.03667
12 h after light	26757.063336666666	26101.11667	27941.77667
1.5 h after dark	27330.334443333333	24570.11667	31339.22333
5.5 h after dark	26215.345556666667	23762.91667	27624.92333
9.5 h after dark	20389.40667	17887.78667	22934.51667