My father and I were coming back from Lake Lowell and on our way back home we noticed a long low glowing bar of light floating along the sky line. As it got closer we could see the lines around it but the other sides weren’t illuminated. Our best estimation is that it was about three football fields long. It looked like it was half the size of the town even at skyline level. It was traveling from Caldwell towards Boise at a slow cruising speed. It quickly sped up and vanished shortly after that. I got a video but it was so dark it’s hard to see anything. If a video editor can enhance the image it will be able to be seen.