condition	mean	min	max
4 h after light	18.6891695	16.812728	20.565611
8 h after light	15.662059	13.615643	17.708475
12 h after light	21.376289999999997	18.102759	24.649821
4 h after dark	18.706959	15.054919	22.358999
8 h after dark	13.561081	12.305811	14.816351
12 h after dark	18.508276	18.508276	18.508276