condition	mean	min	max
4 h after light	6.28213	6.15146	6.464230000000001
8 h after light	6.373623333333334	6.27267	6.55095
12 h after light	6.36352	6.31772	6.40735
4 h after dark	6.343823333333334	6.14524	6.46094
8 h after dark	6.40376	6.25928	6.48201
12 h after dark	6.5632633333333334	6.43551	6.71736