So I have noticed these flying in for the past few months. I know exactly what you are talking about. I flew in/out yesterday. On departure to the north at about 6am, looking west I could see them from about 2,000 feet. Below us was Newcastle Rd., extending Newcastle road in that direction leads you to the south end of the area of lights.

Arriving, we came in from the south about 11pm. We were directly over Indian Hills rd (which turns into Main St for Tuttle and Newcastle), that road line extending out hits the south edge of the area of lights.

Those two lines intersect just west of Tuttle.

Sure enough, a windfarm.