Yes! It is the light of an oncoming train. The first log train from Keasey arriving at Vernonia, Oregon.

I set a goal at the end of our tour of duty in L. L. “Stub” Stewart State Park in September of 2014, to re-create the Disconnect Log Cars so that I could simulate the United Railway and the Oregon American Lumber Company. I had been making a presentation about the history of the railroad using Train Simulator, 2015, a train simulation game. I substituted truck trailers on flat bed cars to demonstrate what the log trains might have looked like. It was a poor substitute.
My first step was to buy an HO gauge model of a Disconnect Log Car on Ebay. I measured it carefully with vernier calipers and created a scale drawing of the car with a CAD program. I imported that set of drawings into a 3D drawing program called Blender.

I built up the car one component at a time until I had a 3D model in the computer. Next I imported the model into the Train Simulator 2015 program. I made logs and loaded them on the cars. Today, for the first time I was able to create a complete train of these disconnect cars. I then programmed the train to come into Vernonia from the direction of Keasey. When it stopped, I took over control of a switcher engine and coupled into the back of the log train and helped to pull it around the log pond to the log dump station.

The program will be ready when we return to L. L. “Stub” Stewart State Park in May this spring.
This has been an exercise in “teaching an “Old Dog” new tricks. What a ride.
By the way “Disconnect Log Cars” have no air brakes when they come down off the mountain. The brakemen run from car to car in their caulk boots setting hand brakes to control the speed of the train. They try to set the brakes just tight enough that the engineer has to pull the train down the hill. Anyone want to help me create some animated brakemen for my Log Cars?