condition	mean	min	max
4 h after light	19.304299999999998	18.0703	20.5383
8 h after light	17.9078	17.1262	18.6894
12 h after light	19.6757	17.9273	21.4241
4 h after dark	19.82295	18.9076	20.7383
8 h after dark	21.4159	20.8628	21.969
12 h after dark	22.31025	22.1718	22.4487