I saw a large triangular craft with three large white lights on the tips and dimmer light in the center.I saw a bright light in the night sky as I approached Scott Rd (Folsom, CA) to the right. I thought it was a helicopter hovering as they do sometimes watching the traffic. I was headed eastbound on Hwy 50 and as I proceeded it became obvious that the craft wasn't a helicopter because it was much too big and far away. As I got closer to it, it was evident that it had three lights and as I passed near the Cambridge Rd. exit, it was now on the right hand side of the freeway and you could see under it and it was triangular, had three large white lights on the tips of the triangles and a dimmer light in the center, with some smaller little lights around it.