The Strip's frenzy of neon was stilled from 8:30 to 9:30 Saturday night in the World Wildlife Fund-sponsored event that promotes awareness of climate change and energy conservation.
The gambling mecca joined thousands of locations around the world for the third annual dimming. The blackout started at the "Welcome to Fabulous Las Vegas" sign and rolled north as casinos shut their outside lights, the Las Vegas Sun reported.
Some were taken aback, but Jose Garcia of Summerlin, Nev., said his family has become more energy thrifty as power and fuel prices have risen.
"Five years ago, everyone in our neighborhood left the lights on outside all night," he said. "We've changed our ways."
"We should be buying smaller cars and conserving energy," said Sean Wright of Las Vegas. "It's the 21st century. It's time to wake up."