If you need to change the light intensity, change the temperature, or turn it off, adjust the color and the "Intensity" parameter in the "Janto_light" material.

If you want to disable the effect of slightly polluted ceiling lights when glowing, then remove the "Color correction" node from the "Transfl. fraction" parameter in the "Janto_glass" material. You can also adjust the degree of contamination by simply moving the "Contrast" and "Brightness" parameters in the "Color correction" map.

Corona physical material

https://www.wayfair.com/home/pdp/george-oliver-janto-3-light-glass-semi-flush-mount-w100420459.html?piid=1455858695