The bulb should be change to an LED to reduce heat. The current set up gets to hot and can cause the roof/paint to get too hot. If you accidently leave your courtesy light on overnight I am not sure what damage could happen to the fiberglass or paint. The Lotus mechanic told me this can cause an issue if left on for too long. The fiberglass roof top doesn’t have antiquate insulation over the light fixture on my 2011. I mistakenly left mine on for 4 minutes and I could not even put my hand on top of the roof directly over the light. I changed the light to an LED and added a small section of Dynamat and no issues.