Thanks Kevin. I updated my post above during the time you replied. I wasn’t expecting such a quick response!
The current reading is 1880 lux, and my light meter reads about 80. I do quite a bit with lighting, so I have a pretty good feel for what’s a reasonable reading and what’s not (1880 is not reasonable under the circumstances). The light meter is fairly accurate. I entered a value in the range of 16000, and it seemed to make no difference.
Have you had any luck with coefficient changes making a noticeable difference? If so, perhaps I have an issue with my sensor.