condition	mean	min	max
0 h after light	21.60245	21.5832	21.6217
4 h after light	18.11355	17.5764	18.6507
8 h after light	19.558999999999997	19.0014	20.1166
4 h after dark	19.43325	18.4875	20.379
8 h after dark	19.86	19.284	20.436
12 h after dark	19.390050000000002	18.7239	20.0562