condition	mean	min	max
4 h after light	23.78295	22.0147	25.5512
8 h after light	19.65185	19.4713	19.8324
12 h after light	18.564	17.1524	19.9756
4 h after dark	20.1369	19.6526	20.6212
8 h after dark	17.74005	17.0935	18.3866
12 h after dark	21.1964	21.0561	21.3367