Does “light activity” during a long rest still allow for the benefits of a long rest?

@ChrisPerkinsDnD do things that count as "light activity" during a long rest still allow for the benefits of a long rest?

— Steph/Moxxie W. Hyde (@BluValkyrie) October 8, 2017

A long rest allows for up to 2 hours of light activity (see "Long Rest," page 186 of the Player's Handbook). #WOTCstaff https://t.co/CRC5DHibPg

— Chrisferatu (@ChrisPerkinsDnD) October 9, 2017