Thank you for the add-on. When checking 'set exposure' while adding a new light, does the new exposure take into account already existing lights in the scene? Or is it only based on most recent light added?
The "Set Exposure" tickbox only takes into account the newly added light.
No Scene information is being used (and I don"t know how difficult, if even possible, that would be..moving the Camera would mean you"d need a different exposure ...)).
If you hide inside the default cube with a candle for instance, then add a Sun and set the exposure, you"d be left "in the dark".