condition	mean	min	max
4 h after light	19247.63092	18771.23206	19724.02978
8 h after light	19635.25514	19628.74597	19641.76431
12 h after light	20750.527195000002	20475.46614	21025.58825
4 h after dark	21876.331684999997	21673.08671	22079.57666
8 h after dark	20037.64847	17696.52642	22378.77052
12 h after dark	20671.77183	20671.77183	20671.77183