Meyer lemons are sweeter than regular lemons, so you can reduce the sugar in this.
Makes about 2 quarts.
1/2 cup simple syrup made from 1 cup water plus 1 cup sugar
2 cups Meyer lemon juice
4 cups cold water
Make simple syrup: Heat the 1 cup water and sugar in a saucepan, stirring frequently, until sugar dissolves. Mixture will be clear. Let cool.
In a pitcher, combine the lemon juice, 4 cups water, and 1/2 cup simple syrup. Taste and add more syrup if desired. (Store any remaining syrup in the refrigerator for future use.)
Serve cold over ice.