Final answer:
The leader of the New Lights was Gilbert Tennent, who was a key figure in the Protestant revival in the Middle Colonies and helped found seminaries and colleges associated with the movement.
Step-by-step explanation:
The leader of the New Lights movement was Gilbert Tennent. He was inspired by the revival efforts of Theodorus Frelinghuysen and went on to kindle a Presbyterian revival in the Middle Colonies.
His efforts included founding a seminary to educate other evangelical clergymen, which significantly contributed to the spread of the revival movement. Notably, the New Lights were also responsible for the founding of institutions that would become Brown University and Dartmouth College.