condition	mean	min	max
0 h after light	17.481099999999998	16.3337	18.6285
4 h after light	19.88355	19.2033	20.5638
8 h after light	15.71425	12.534	18.8945
4 h after dark	17.68255	16.7822	18.5829
8 h after dark	22.1255	20.5415	23.7095
12 h after dark	18.4553	15.308	21.6026