condition	mean	min	max
4 h after light	8.249487	8.150639	8.348335
8 h after light	7.9688735	7.47724	8.460507
12 h after light	8.1898315	7.982052	8.397611
4 h after dark	8.7223075	8.573861	8.870754
8 h after dark	7.8734135	7.612104	8.134723
12 h after dark	8.890904	8.890904	8.890904