Light emanating from the Beacon and Middle Units is visible from the campground. Mr. Theken and Mr. LaFrance did not perform any testing or measurements to quantify the amount of light, direct or indirect, which emanated from the Beacon or Middle Units before light shield installation. Mr. Theken and Mr. LaFrance have not performed any testing or measurements to quantify the amount of light, direct or indirect, which emanates from the Beacon or Middle Units after light shield installation. Direct light is unrefracted or unreflected light. Direct light can only be seen when the light source generating the light is unobstructed from view.
Indirect light is refracted or reflected light.
If a light source such as a light bulb is entirely obstructed from view, such a light source does not produce for the viewer any direct visible light. Any light visible to the viewer from such a light source is indirect light. The further away from the Tower one moves, the more direct light from the Tower one can see. Conversely, the closer to the Tower one moves, the less direct light from the Tower one can see. While travelling on Interstate 89, one can see direct and indirect light emanating from the Tower.