Lights in V-shaped formations over Florida

I saw lights like that about ten years ago over Lake Monroe, Florida. It looked like just lights, i.e., no 'vehicle' that the lights were attached to. Whatever it was, it was completely silent and moved extremely fast, parallel to the lake's shoreline. I was alone at the time, sitting in my truck looking out over the water. After it disappeared, I looked around for another person to ask if they'd seen it too, but there was no one else around.