Flashing light in the sky?

About 7 years ago I was with a friend outside late at night. We saw a light that was intensely white and looked quite far away but was perhaps 1/4 the size of a 'normal' moon size but was brighter in light than a bright full moon. It illuminated the ground around us and it was similar to early dawn. There was no sound ociated with it. The light was moving northwest fairly slowly and after a few seconds the light started flashing and became like a strobe effect. After a few more seconds of this, it went out. We were not far from fort campbell so I'm uming it was military of some type but wondered what could have a light so intense and bright and no sound.