The inspector is not looking for the gap of the fixture to the sheetrock, what some inspectors want is a fixture rated " Air Tight " Based on the CAN Only, Some inspectors approve the CAN with the TRIM added to comply to AIR TIGHT Rating. But is some axcept one and not the other, who has the final say, Don't forget under NYS LAW, this issue dose NOT Fall Under AHJ. This is a Building Energy code issue, Not
electrical. Some Towns let the building inspector call the shots...
