Lukung and Spangmik are both on the banks of Pangong Tso. Lukung comes first and for Spangmik, you have to ride along side Pangong Tso for around 5-6km to reach Spangmik.
Checkout the location of Spangmik for your refrence in the attachement...
btw how much wld a tent cost if i intend to rent one from leh and carry it to pangong tso??
We are visiting Nubra in August first week. Instead going back to Leh can we to go directly to pangong this way- Diskit> Khalsar > agam > Wari La > Shakti > Chang La.
We will stay at Shakti instade Leh that night.