Recessed lighting question

When I had my home energy audit done, I got a list of several things to be done to become more energy efficient. I am working through the list and have come up on one I need some advice on. According to the audit guys and their $7K infrared digital camera, I have infiltration at my recessed lighting fixtures. How do I correct the infiltration from the bottom rather than up in the attic? Some of them are in a ceiling with no attic above them and some are on the far side of the A/C ductwork.

I have seen plastic "cans" that go over the recessed cans and seal out the attic air, ( I don't think I can use them from the bottom though) I have also seen "airtite" recessed cans and trims and would cost me about $20 each to repalce them (about 12 light fixtures). Will they stop the infiltration?

I am currently using HALO 6 inch cans that are "remodel" and rated IC for "in contact" with insulation.

thanks

I don't know if I'd do anything. It depends on how much is coming in. You can make a house so airtight that it becomes unhealthy. Was this done by FPL? I had "Bob" from FPL come for an audit many times, never got me anywhere to real savings. "Bob" was a joke. They just had the same "canned" answers each visit. Never did get my monthly bill down below $300. It usually was $450/month and this was in the 1990s. 2700 SF under central air in North Palm Beach. After my divorce I got the bill down $135/month just by opening the windows, turning off lights when not in a room, and not running A/C.
I'm not advocating getting a divorce to save on the power bill, it just worked for me.

unless that lad got up on the roof and measured his 7k machine downwards he's only kinda guessing..anyway them lights will be fine if the insulation around them is all puffed up rather than shoved in around the lights tightly as its all about the air insulation traps....packed too tight then no use!!

The airtight cans will greatly reduce the infiltration, but like Peter says, you need some ventilation. How did your windows do in the test?

My electric bill was $27 last month! Peaked at $68 in January with electric heat! That's the month it went below 20*F !!

Mods to my house include insulated windows, adding double walls to my bedroom (two layers of exterior wall!), six more inches of attic insulation, replacing central gas heating with electric room heating, replacing bulbs with CFLs, ceiling fans in living room and bedroom, and this summer I hung shade cloth from the western eves.

The shade cloth alone dropped the interior temperature from 80ish to below 75.

Remodel cans can be dropped from below - so drop them and check the insulation around them. If they are IC they should not be ventilated and you can fill the area around them with insulation right up to the can. You can caulk the rim of the can where it meets the drywall, or otherwise gasket that - but this all sounds like overkill as you probably have other lower hanging fruit - unless he called these out especially for some egregious installation...