At Exit 4 Truck Stop, in Hudson, Wisconsin, off I94, at about 10:30 PM at night, I was in a friend's truck outside in the parking lot of the truck stop, when a glowing light started to fill the sky above us, it was like a beacon coming closer and closer until it filled the whole space above the truck stop, it was so big, you could not see where the object ended. It was approximately 500 feet above the truck stop. It was a bright white light that had a haze to it. On channel 19, the truckers were speaking many profanities because they couldn't understand what it was. The object laid above us for approximately 5 minutes although it felt like a half hour, I don't remember looking at my clock to see how long it was actually there for. Channel 19 went wild with hysteria and confusion. The light made absolutely no noise whatsoever it was so quiet it was scary. I don't remember hearing the engine of the truck roaring. At the same moment the light disappeared, the lights in the truck stop went out as did the electronic equipment and all Semis and vehicles in the parking lot. This happened in a blink of an eye, approximately five seconds and it was gone. We all were dumbfounded. After the incident, we all looked up to the sky and noticed many helicopters around the area. Not many people talked about it though afterwards, which I thought was weird. I've always wanted to report this incident but didn't know who to talk to.