This Giant Searchlight Once Scanned L.A. From the Mountains Above

As twilight faded over Pasadena on September 9, 1894, an artificial sun flickered to life for the first time. High above town in the San Gabriel Mountains stood a wonder of the new electric age: a 60-inch General Electric searchlight, by many accounts the largest in the world. This massive projector first dazzled audiences at the 1893 Chicago World's Fair. Now it would perform its nightly spectacle in the mountains above Los Angeles.

Up above, on the summit of Thaddeus Lowe's Echo Mountain resort, tourists wrapped themselves in blankets and huddled around the searchlight as its operator fired it to life. When running at 200 amperes—a current generated by a Pelton water wheel in a nearby canyon—the carbon arc lamp burned with the intensity of 90,000 to 100,000 candles. A massive reflecting lens mirror, built in France, magnified that blaze to 375 million candlepower.


This dazzling beam blanched the flatlands below. It wandered the streets of Pasadena. It streamed through the windows of San Gabriel farmhouses with the ardor of day. Lowe's publicist claimed you could read a newspaper under its light from 35 miles away. It was definitely visible 60 miles away on Catalina Island, a hot white dot hovering just above the horizon.

Some watched the show with amusement. Children lit signal fires or flashed red lights to attract the operator's attention. The mischievous ones bounced the sunbeam back with hand-held mirrors. Others reacted with alarm. Horses startled. Roosters crowed. Lovers cursed.

In an 1895 dispatch, author Grace Ellery Channing recalled the scene atop Echo Mountain:

Now its tunnel of light went sweeping across the plain below, resting here and there where a red light signaled for a visit. Down below that beam had almost dazed us with its brightness; here we could stare into the very eye of the monster without blinking, for the rays do not focus so near.

Away, back and forth, went the finger, now stretching out into a full hand of light, now narrowing to so fine a line that it could be but barely perceived…But the prettiest thing of all was to watch the stream of bats and insects across the golden beam. As these entered it they, too, became golden, so that there as a continual flight of golden wings and shapes darting from the dark into the dark, with a golden moment's apotheosis between.


The searchlight was just one of the modern marvels collected by Lowe, a pioneering aeronaut who had commanded the Union Army's Balloon Corps during the Civil War. At Echo Mountain, his "White City," Lowe placed an observatory with a 16-inch refracting telescope and hired a renowned astronomer to manage it. He is best remembered for his Mount Lowe Railway, the world's first-all electric mountain railroad, which climbed 3,000 feet into the San Gabriels over white-knuckle cliffs and a soaring, 1,300-foot funicular. But nothing signaled the dawn of a new electric age in the Southland like Lowe's searchlight, its sun-shaft overthrowing the dark of night.


All images courtesy of the Mount Lowe Preservation Society, except the last photo, courtesy of the UC Berkeley Bancroft Library.

Southland is made possible by a partnership among Gizmodo, the USC Libraries, and the member collections of L.A. as Subject. Written by Nathan Masters, the series explores the urban past of Los Angeles, including the lost landscapes and forgotten infrastructures that continue to influence the city we know today.


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