condition	mean	min	max
4 h after light	7.537023333333333	7.36348	7.6272199999999994
8 h after light	7.34774	7.231489999999999	7.45915
12 h after light	7.176209999999999	6.91604	7.4530199999999995
4 h after dark	7.328203333333334	6.952610000000001	7.562939999999999
8 h after dark	7.376103333333333	7.12488	7.553389999999999
12 h after dark	7.247813333333333	7.23613	7.2625399999999996