You mean you want to sweep them into Litecoin core? or you already have them in Litecoin Core and want to send them somewhere else?
If you already have your coins in Litecoin Core... why would you want to change? It isn't that bad to sync up the blockchain on Litecoin... it isn't as big as the BTC blockchain
But if you want a lightweight LTC wallet, I believe there is
a version of Electrum for LTC that is actively developed. I cannot comment on whether or not it is any good though.