Quite bright RED lights above an Irving Gas station on 302, Bartlett

I was leaving a rented condo for a trip back to work in the Boston area.  There is a procedure to that for leaving:  Making sure I'm cleaning up after a quick breakfast, shutting off water and heat, etc.  Upon departure I checked the north facing deck on the ground floor for signs of my stuff and looking at the weather.  Dark outside at 5:30. Planning to leave at six.  Cloudy conditions with a cloud base probably at 3500 feet, which obscures mountain tops in the area.  Looking across the river valley (Saco), there was a dense mist, cloudy fog.  Between the layers was a bright red light.  I had on 2.5 cheater glasses, and went back in to get a 1.00 glasses.  I noticed another dim light breaking to the R of the 1st.  It increased in brilliance to the same intensity.  Both hovered over Rt 302.  two minutes to the same intensity.  Then a 3rd, same increase over two min.   watched for minutes, and then they winked out slowly.  I've never seen anything but bright ! white lights there at an intersection BELOW that area.