condition	mean	min	max
4 h after light	7.8998115	7.798454	8.001169
8 h after light	7.4482685	7.3956	7.500937
12 h after light	7.5799395	7.500937	7.658942
4 h after dark	7.263793	6.528431	7.999155
8 h after dark	7.182281	6.863625	7.500937
12 h after dark	6.930649	6.930649	6.930649