But i m quite sure the dark ring was not a lighting issue.
Wet attic ceiling.
If the fiberglass within your wall cavity or in your attic becomes wet from a leaky roof or burst pipe it will lose insulating effectiveness until the material dries.
If the attic has blown in cellulose check to see if.
There are many signs that an attic is wet.
Prolonged wetness will rot out the roof sheathing.
Moist or wet insulation.
Often this is first noticed when re shingling.
However you ll need to drain it frequently in order for it to function properly.
What to do about a wet attic.
Condensation on your ceiling can cause water damage and promote the growth of mold or mildew.
Coping with wet insulation.
How to fix ceiling condensation.
At higher levels relative humidity condensation can even occur inside of the house on windows cold walls or ceiling surfaces.
Placing a dehumidifier inside the attic will help to draw out moisture from the surrounding environment.
Depending on how tight a house is constructed and the outside temperature even a relative humidity of 30 percent may be too high.
Drying out a wet attic.
The ceiling is the popcorn ceiling and the darkest areas are the areas which stick out the most.
Once the dehumidifier s storage tank is full it won t be able to remove any more moisture.