We were visiting my parents on a gravel road. We had left to go to the store, it was already dark outside, and when we returned, we noticed glowing balls of light. The first two was on the road. We sped up to take a better look, and they went into a nearby field. As soon as they crossed the fence line, the third one lit up. Then more came, I'd say up to ten at a time. There were some high in the sky doing circles. They would come on and go off just like someone had flipped a switch. They did not blink, they were constant light until the light went off. Some had a halo glow around them when they lit up. When my wife got scared and we decided to go back to my parents house, three of them followed us to their driveway, then they disappeared. It was almost like they were playing with us, the way they would light up then disappear. I have always been a skeptic and been able to explain most anything. This time, I can find no reasonable explanation for what I saw.