Pour water, lemon juice, and simple syrup into a large pitcher or pourable container and stir until combined. Reserve 1 quart of homemade lemonade for making the Half and Half. Pour some of the lemonade into an empty ice cube tray and freeze until frozen solid.
Transfer lemonade ice cubes to a large pitcher or easily transportable and pourable container. Pour the iced tea and 1 quart of the homemade lemonade over the lemonade ice cubes and stir to blend.