Texas also has a lot of wind power. I was driving though at night one time and there were turbines on either side of the road as far as could be seen. Thing is, they are tall so they have those red airplane warning lights on top - which would all flash at exactly the same time. A rather trippy thing to see.
At first I questioned your assertion, but after reading the most recent FAA AC revision (https://www.faa.gov/documentLibrary/media/Advisory_Circular/...) I found:
13.5.3 In most cases, not all wind turbine units within a wind turbine farm need to be lighted. Obstruction lights should be placed along the perimeter of the wind turbine farm so that there are no unlit separations or gaps more than 1/2 SM (0.80 km) (see Figure A-26). Wind turbines within a grid or cluster should not have an unlighted separation or gap of more than 1 SM (1.61 km) across the interior of a grid or cluster of turbines
Depending on which one, most of them don't have airplane warning lights. There have been extensive study, and if done right you can only light up a small number but because the lights are synchronized that is a better stay away indication than having a light one them all. (lights not synchronized is a disaster - too many lights to keep track of)