CFL Issues - Electrical - DIY Chatroom Home Improvement Forum

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Electrical


Thread Tools Display Modes
Old 11-14-2010, 02:09 AM   #1
Join Date: Nov 2010
Posts: 2
Rewards Points: 10

CFL issues

Hi all,

I had a contractor install recessed lights (CFLs) in our living room and noticed a couple of things, which concerns me. The CFL bulbs used are plug-in type with 4 pins, 26w ones. IC-rated casings for CFLs where used since we have insulation in the attic (Halo H272RICAT)

(1) I noticed that when I plugged in a bulb, the bulb flashed (turned on and then off really quickly) even with the switch off. I actually noticed this a few times with different sockets. Is this normal or does this indicate some bad wiring?

(2) This evening, one of the lights suddenly went off. I was suspecting the bulb was burnt out (it was a brand new one though) and tried it into another socket, but it was actually working okay. So I plugged it back in and turned on/off a couple of times, but each time it went off after being on for a short amount of time.

Then I realized that the casing has some thermal protection and thought it might have been overheated (although I didn't turn it on for a long time). So I waited a little and tried again. This time it went off again immediately and I actually heard some noise, so I checked the bulb and found that it got cracked.

So I removed the bulb and put another one in there and it is working okay till now.

Should I worry? Is it not rare that a CFL bulb gets cracked when turned on? Also, can it be overheated easily to have thermal protection to kick in? Or some bad wiring can cause overheating as well?

I am not sure if it was due to some shady work by the contractor or I am overreacting over something that is normal and expected for CFLs. I'm a novice in this area, so any help would be appreciated. Both incidents concern me greatly.


sjpoolowner is offline   Reply With Quote
Old 11-14-2010, 08:22 AM   #2
Just call me Andrew
Join Date: Mar 2009
Location: Albany, NY
Posts: 2,261
Rewards Points: 1,018

What type of switch are you using to turn these lights on and off?



secutanudu is offline   Reply With Quote
Old 11-14-2010, 08:25 AM   #3
Join Date: Mar 2007
Location: Eighty Four, Pa.15330
Posts: 1,597
Rewards Points: 1,192

Electronic ballasts will do that.
bobelectric is offline   Reply With Quote
Old 11-14-2010, 09:53 AM   #4
Join Date: Nov 2007
Location: Nashua, NH, USA
Posts: 7,833
Rewards Points: 3,772

Every once in awhile a compact fluorescent bulb has a thin spot in the glass and can break with the least bit of rough handling. To prevent this kind of problem, hold it by the plastic base when inserting and removing it.
States can help recovery from hurricanes and tornadoes by not requiring due digence or prompt and timely correction of substandard conditions, and by providing continued liability insurance where companies drop homeowners.
AllanJ is offline   Reply With Quote
Old 11-14-2010, 09:58 AM   #5
Pro Flooring Installer
rusty baker's Avatar
Join Date: Feb 2009
Location: SW Missouri
Posts: 4,780
Rewards Points: 518

I have purchaesd several CFLs that were bad. They had shorts or didn't work at all. They came from WalMart. I assume every store will have some bad ones.
The ads in my post are there without my permission. I do not endorse any of the products.
Semi-Retired Installer
Installing since 1973
rusty baker is offline   Reply With Quote
Old 11-14-2010, 04:45 PM   #6
Join Date: Nov 2010
Posts: 2
Rewards Points: 10

Thanks for all the answers. The switch is just plain on-off switch, not a dimmer (don't know if there are other types). And I am not sure if the crack was caused by my handling or made when the bulb went off (cause I heard some sound then).
sjpoolowner is offline   Reply With Quote
Old 11-14-2010, 05:15 PM   #7
Electrical Contractor
kbsparky's Avatar
Join Date: Sep 2008
Location: Delmarva
Posts: 3,368
Rewards Points: 2,000

Static electricity can cause those bulbs to flash when installing `em.



Life is uncertain -- eat dessert first!!
kbsparky is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Lots of issues - before staining concrete catchacold Flooring 7 11-25-2011 08:07 AM
water supply issues (sediment/rust/blockages) hockeytown9 Plumbing 7 07-23-2010 11:29 PM
Spray foam - code issues? upinsmoke Building & Construction 1 05-10-2010 07:47 PM
Ice dams issues faller Roofing/Siding 16 01-24-2009 04:02 AM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1