Combine the blueberries and lemon juice in a large saucepan set over medium heat. Bring to a boil, and cook, stirring occasionally, for 5  minutes. Remove from heat and pour through a mesh strainer into a bowl, using the back of a spoon or spatula to squeeze out all the juice. Discard solids and rinse saucepan.

Bring 4 cups of water to boil in the same saucepan. Add the tea bags and remove from heat. Allow to stand for about 5 minutes, then discard tea bags. Stir in the sugar and blueberry mixture. Pour into a pitcher and chill for at least an hour. Serve over ice with desired garnishes.