condition	mean	min	max
4 h after light	21224.463333333333	19594.6	22087.79
8 h after light	16882.114999999998	13742.845	21697.86667
12 h after light	15027.695556666667	13176.17667	17120.17333
1.5 h after dark	20947.87555333333	19686.73333	22941.12
5.5 h after dark	21870.12111	21107.68	22346.65
9.5 h after dark	22027.253336666665	20677.64667	23067.59667