Looking at leaky can lights.

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

Views: 309

Comment

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

Join Home Energy Pros Forum

Comment by Adam Zielinski on March 24, 2011 at 3:01pm

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 5:42pm

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

 

Comment by Bob Small on January 20, 2011 at 6:04pm
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 1:55pm

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

Comment by Jim Gunshinan on December 20, 2010 at 1:54pm

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 10:36am

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.

Forum Discussions

How would you insulate this roof?

Started by David Butler in General Forum. Last reply by David Butler 1 hour ago. 34 Replies

Psychrometric Chart Training

Started by John Krochmalny in Training. Last reply by Mahendra Shah on Friday. 1 Reply

Dirty solar panels

Started by Evan Mills in General Forum. Last reply by Stacie Bagnasco Oct 16. 1 Reply

Latest Activity

David Butler replied to David Butler's discussion How would you insulate this roof?
"Sean Lintow proposed rails and clips (re: first comment in this discussion), but in the context of…"
1 hour ago
Brad Cook replied to David Butler's discussion How would you insulate this roof?
"I missed where the suggestion for rails came in. The plywood would not need any rails. 4+ inches is…"
5 hours ago
David Butler replied to David Butler's discussion How would you insulate this roof?
"I'm a little confused about the necessity and purpose of using support rails if working on…"
5 hours ago
David Butler replied to David Butler's discussion How would you insulate this roof?
"If you insulate master bedroom and family room from below, you definitely need more R-value than…"
6 hours ago
David Butler replied to David Butler's discussion How would you insulate this roof?
"Brad, I was only talking about using EPS between the ridges, if necessary, to conform to bolts.…"
6 hours ago
Brad Cook replied to David Butler's discussion How would you insulate this roof?
"It kind of depends on the PIC. Not all insulation is made the same. Here in VT (and all of New…"
6 hours ago
David Butler replied to David Butler's discussion How would you insulate this roof?
"Filling those shallow valleys with rigid foam not only prevents primary foam panels from…"
6 hours ago
Brad Cook replied to David Butler's discussion How would you insulate this roof?
"Bill, you just posted a number of responses in different areas of the thread. I will try to respond…"
11 hours ago

Photos

  • Add Photos
  • View All

© 2017   Created by Home Performance Coalition (HPC)   Powered by

Badges  |  Report an Issue  |  Terms of Service