Every night from December 1st through January 3rd, the Holiday Lights Show Spectacular will be shown every half hour and hour at the Gazebo on Main Street.

From The Grapevine which is published by the City of Grapevine:

Hundreds of thousands of lights dance in synchronization to high energy and traditional holiday music. A must see holiday attraction.

This looks like another great holiday event that is held nightly in Historic Downtown Grapevine.  This is worth seeing especially if you are already out doing you shopping or dinning in downtown.