some recessed lighting is absolutely horrendous in design

have notice some that are ic rated (supposedly okay to come in contact with
insulation) yet they have:
- holes in the housing (fiberglass dust, carcinogenic, from the attic
can pass right through them, as well as other types of harmful to human dust
which accumulates in attics)
- fiberglass placed INSIDE the housing (exposed to the interior of the
home) by the manufacturer

few would cut a hole in their ceilings to allow air flow from the attic to
enter the house, yet this is what is done when some recessed lights are
installed

supposedly even the air tight recessed housings are not 100% air tight
between the living area and the attic