Ceiling Can Lights Insulation

Pushing the insulation away is not an effective solution since it creates air passages in the building envelope and wastes energy.
Ceiling can lights insulation. Apply the sealant around the cable and along the edge of the cover where it rests on the ceiling. If you have recessed lights installed in the ceiling you need to keep the insulation away from the heat generated by the lights because it is a fire hazard. Up in the attic clean the ceiling surface around each fixture slit the cover to accommodate the electrical cable and place the cover over the fixture. Now it will be safe to heap insulation onto that spot.
Recessed light in a cathedral ceiling recessed lights often leak warm moist air against cold roof sheathing which eventually causes roof rot. The dam should provide a minimum 3 inch space around the perimeter of the can. The lights malfunction is a concern and a safety hazard. According to the department of energy recessed lights account for 50 of the total thermal losses of a ceiling.
Construct a circular dam to place around each can with wire mesh or sheet metal if the lights are not ic rated.