Steep 8 black tea bags in 1 cup boiling water, 6 minutes; discard the tea bags. stir in 1 1/2 cups raw sugar and the zest of 1 lemon (in strips). let cool; strain into a pitcher. add 3/4 cup lemon juice, 2 cups southern comfort, 4 cups ice cubes and 1 sliced lemon. stir to partially melt the ice. pour into glasses.