Place mint sprigs in large pitcher;mash with muddler or handle of woodenspoon until slightly bruised.
Pour in tea,lemonade, and vodka. DO AHEAD: Can bemade 1 day ahead. Cover and chill.
Fill 8 highball glasses with ice. Dividesweet tea among glasses.
Garnish withlemon slices.
To streamline this recipe,you can use one cup Sweet Tea Vodkafrom South Carolina's Firefly Distillery inplace of the tea and the vodka. For a list ofdistributors, go to fireflyvodka.com.