Window shutters are an ideal choice when you're looking for optimum control over light and privacy.
The advantage of shutters compared to other window coverings is the ability to open and close separate blade (louvre) sections in each shutter panel. For example, the top half of shutters can be opened to let light through, while the bottom half remains closed.
Alternatively the top half can be closed for privacy from neighbours etc. while the bottom half stays open. If shutter panels are tall enough, it is possible to have three independent blade (louvre) sections; top, middle and bottom, for even greater control.