From Grass Collective:
"Rivers of Light is a dazzling light show filmed from the air. The camera sweeps smoothly across in infinite spectral sea. Millions of lights flow through freeway arteries and shine from skyscrapers, stadiums, parking structures, shopping centers, and homes. On the DVD nearly two hours of continuous footage explores the vastness of Los Angeles basin in the brightness of night."
From their website, click on the PREVIEW or you can download a free 10 min. sample video using Quicktime :