Recessed lights, vents or any device in your ceiling allows an entry into your home for pests. As you check your light, vents etc look for space between the ceiling and the device. Those holes they make in the drywall are often larger that the device fitting through.
Use a caulking material and make that gap go away. This also helps in keeping the cold air in and the warm air in depending on the time of year. Those Recessed lights etc are a quick way in for numerous pests, so fix them and this also will save you money and who doesn’t like that. Remember that scorpions only need the thickness of a credit card to sneak in. Owning a house takes effort but together with a reputable honest Pest Company such as ProBest Pest Management 480-831-9328 it will be a breeze.