From my patio in SE Denver west to the foothills below Mt. Evans and due south are nightly lights that flare up and fade away. First noticed in July and have observed on a regular basis since. Now that the tress are losing leaves, I have a wider view of the mountains and am see more of them. I thought they were car headlights or warning towers for small planes. Some of the lights appear fixed, as they are in the same location when they appear. But they don't appear every night. Others come and go. I'm now seeing them at sunrise, swarming in clusters in a small area before disappearing. It's as if they're returning 'home' from a night of activity. Saturday evening, 10-18-14, the sky was totally clear except for a wispy cloud formation over our neighborhood. Inside the thickest part of the cloud was a beam of light rotating clockwise. As the cloud drifted toward the west, so did the ball of light. It eventually dissolved. Now that I'm reading of these accounts on MUFON, I want to add my experience. It's very puzzling and addictive.