2 Brilliant LightsRadiant white rather large light (larger than commercial jet landing lights, even at close proximity), with hints/twinkles of many colors.(NOT VENUS) A bit overwhelming to view. Different than landing lights on commercial jets. Stationary or very slow moving. To the NNW of Portland TN. Visible, heading from 52 West by I-65 Entrance headed towards Orlinda. We were on way to airport so had to move on and leave without further investigating. Bright light really grabbed our attention and we were trying to figure it out, pulled over on entrance to I-65 to watch and a second brilliant light appeared out of nowhere to the left (South or West) of original light. Extremely clear skies tonight. This light just blipped into existence unlike aircraft approaching from distances which can obviously be viewed for a while before lights become brighter. Same intensity and brilliance. It moved around the original light to the north and then back around towards the west a! nd south and became dim. At this point I thought we saw some flashing lights on the 2nd object as it headed south or south west. Assumed possible military testing/training out of Clarksville. The originally light stayed in place while the other circled around it (or looked to do so). Maybe helicopters? Either way, out of the ordinary - we come from an aviation family and are used to spotting all sorts of lights and craft. Fun seeing something different! We got fuzzy video after the 2nd light moved on --- it just popped out of nowhere, wish we could have gotten that on video- pretty impressive.