[secutanudu]

Some fiends of mine have a room with 8 recessed lights, above which is an attic. In the winter, they can feel cold air coming in from each light fixture. Is there a way to "convert" fromt heir old non-ic non-airtight cans to IC/Airtight? Or do we just need to replace the lights?

 

[SD515]

See if you can find some air-tight trims that fit those cans. Big-box stores carry some.