In a saucepan, add the bourbon, butter, brown sugar, lemon juice and water. Stir and let it boil softly on the stovetop for about a minute, until the sugar is dissolved and the alcohol has burned off. Turn the heat to simmer and let it softly bubble for about 5 minutes. Place the peach halves in a baking dish and pour the syrup over them, using a pastry brush to paint the glaze on evenly. Let them sit covered in the glaze at room temperature for 30 minutes.