Red Lights in Unison

Stay out after dark and the western horizon starts to pulse red.

It isn't lightning, and it isn't a town. It is Limestone Wind: more than eighty turbines spread across the sky from the southwest to the west-northwest, the nearest only a few miles away and the farthest about fifteen. Each is a General Electric machine with its hub about 384 feet up and its blade tips reaching 614. The project came online in 2022, with a capacity of about 299 megawatts.

Every one of them carries red aviation lights, and they do not blink at random. Federal aviation standards call for the lights across an array like this to flash simultaneously, within one-twentieth of a second of each other, twenty to forty times a minute. For turbines this tall, over 499 feet, every turbine in the farm is lit, not only the ones along the edges. So instead of scattered twinkling, you see one slow pulse spread across the horizon: dark, then red, then dark.

In daylight the standards don't require the lights, and you would hardly notice them. At night they are impossible to miss.

Some wind farms now use radar-activated lighting that switches on only when an aircraft comes near. Texas does not require it; bills to change that died in 2023 and 2025. On the nights we have watched, Limestone Wind blinks from dusk on.

one slow pulse spread across the horizon: dark, then red, then dark.

Then let your eyes adjust. This is a rural sky, roughly class 3 to 4 on the Bortle scale astronomers use to rate darkness. By satellite estimates, man-made light here is still a little less than the sky's own natural glow. The brightest dome sits to the north-northeast: Corsicana, the county seat. Farther off to the north-northwest, Dallas makes a faint smudge. To the south-southeast is Mexia, and behind the turbines, to the west-southwest, lies Waco.

A few miles east, settlers once named a ridge for a view of the Promised Land. From here, after dark, the view comes with a heartbeat.

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