Looking at leaky can lights.

Leaky recessed-can lights were big energy wasters before they were sealed.

Views: 298

Comment

You need to be a member of Home Energy Pros to add comments!

Join Home Energy Pros

Comment by Adam Zielinski on March 24, 2011 at 12:01pm

Sealing up a can light with a foam board box is a code violation and unsafe.  If you do it, you need to use a non combustible material, like drywall, or one of the tenmat mineral wood recessed light covers.  http://www.tenmat-us.com/

 

The Cree LR6 LED conversion kits are nice, and should cut down on air leakage.  However if you install them in a non-IC rated can light housing, you still are not supposed to put insulation over the top of them.  So you would still have to baffle around the can in the attic.   The best option for Non-IC can lights is to remove them and replace them with IC rated fixtures, or some other alternative lighting. 

 

Comment by Jim Gunshinan on January 24, 2011 at 2:42pm

Haven't heard of that Bob, thanks for the heads up!

 

Comment by Bob Small on January 20, 2011 at 3:04pm
Have you seen the Cree LR6 LED conversion? www.creeLLS.com Lets you switch to an LED bulb in a sealed unit that screws in to your existing can housing. Great price too.
Comment by Jim Gunshinan on December 20, 2010 at 10:55am

Sorry, that was five years ago when Larry wrote his article.

Comment by Jim Gunshinan on December 20, 2010 at 10:54am

Larry Armanda, who used to call himself the "Can Man" because he spent a lot of time looking at and fixing recessed can light leaks, wrote about it for Home Energy in 2005 "Further Wrestling with Recessed-Can Lights" (Sept/Oct). He didn't find a great retrofit kit, but Builders Best and Lithonia Lighting put out some good kits for sealing the can lights. That was ten years ago, so things may have changed.

 

At our house the contractors used a non-expanding spray foam to seal the lights where the fixture meets the ceiling. (The retrofit kits have a spongy gasket that does the same thing.) Then our contractor made boxes out of foam board to insulate the can-lights on the attic side. There was one problem—the can lights with incandescent lights stay on for about two hours and then the thermal cut off switch turns them off. The insulation makes the light fixture heat up rapidly inside. Without a thermal cutoff switch, the fire danger would be pretty serious. We put CFLs in the can-lights and fixed that problem. We need a brighter light in one room, over a desk, and still have an incandescent there. It cuts off after a few hours and I take it as a signal to get away from my desk for a while! They should be CFLs that give that kind of light but we haven't found it yet.

 

Hope this helps!

Comment by dale conner on December 20, 2010 at 7:36am

Do you know of a good kit for converting the leaky lights to sealed ones? I pulled my leaky lights out of my house and replaced them with sealed lights but only because I was able to access them via the attic space.

Home Energy Pros

Home Energy Pros was founded by the developers of Home Energy Saver Pro (sponsored by the U.S. Department of Energy,) and brought to you in partnership with Home Energy magazine.  Home Energy Pros is sponsored by the Better Buildings Residential Network.

Latest Activity

Colin Genge's video was featured

Passive House Testing Webinar (Feb 13, 2014)

We covered: - Measuring air leakage in a tight house; - New passive house testing equipment; - Powered flow hoods for accurate measurement of HRV ERV flow ra...
2 hours ago
Colin Genge posted events
9 hours ago
John Nicholas replied to Sean Lintow Sr's discussion Duct Testing - is a change in order? in the group Best Practices (Residential)
"Yes,  I was connected to the AH cabinet.  I find it easier in this area, given the common…"
11 hours ago
Colin Genge replied to Kim Tanner's discussion Blower Door Applications Guide in the group Multifamily Buildings
"This is a great guide that anyone testing with multiple fans should get hold  of. "
12 hours ago
Colin Genge added a discussion to the group Multifamily Buildings
Thumbnail

Just posted a lot of Multi-Family oriented blower door videos.

Just posted a lot of Multi-Family oriented blower door videos. Everything to do with Multi-Fan…See More
12 hours ago
Colin Genge joined Norm Bourassa's group
Thumbnail

Multifamily Buildings

For too long there has been relatively little EE focus on multifamily, but some new programs have…See More
12 hours ago
Colin Genge replied to Sean Lintow Sr's discussion Duct Testing - is a change in order? in the group Best Practices (Residential)
"I would assume you tested that high air leakage from the equipment cabinet and not on a flex…"
12 hours ago
Colin Genge replied to Sean Lintow Sr's discussion Blower Doors & Methods Used in the group Best Practices (Residential)
"For those of you who need  a Tectite report, FanTestic's report Generator is powerful…"
12 hours ago

© 2015   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service