Tom Brosz and I worked on this one time after I came back from Mt. Whitney through Las Vegas. Damned light intrigued me. Tom found it wasn't a laser, and this article explains why the light seems to follow one around. Damnedest thing.

"The tip of the pyramid contains a fixed-position spotlight that points directly upward – it is the brightest beam in the world, and is visible from anywhere in the Las Vegas valley at night, and can be seen at flight level from above Los Angeles, California, over 275 miles (440 km) away. In the spring, the bright light attracts huge numbers of moths into the light beam, creating a phenomenon that has been likened to snow. The beam is currently powered by 39 Xenon lamps operating at 7,000 watts each at an hourly operating cost of $53 (lamps, repairs, and electricity costs). The beam's output is rated at 41.5 billion candlepower."

Arf