condition	mean	min	max
4 h after light	17.266750000000002	16.9078	17.6257
8 h after light	21.1375	20.9534	21.3216
12 h after light	18.740000000000002	17.527	19.953
4 h after dark	21.8875	21.1833	22.5917
8 h after dark	19.92315	19.5425	20.3038
12 h after dark	20.44265	19.6979	21.1874