condition	mean	min	max
4 h after light	7.0948215	6.937451	7.252192
8 h after light	7.1012125	6.596239	7.606186
12 h after light	7.1538015	6.804777	7.502826
4 h after dark	7.3462865	6.775787	7.916786
8 h after dark	6.657207	6.281403	7.033011
12 h after dark	7.065819	7.065819	7.065819