New Bulb, Old Fixture - Don't Work - General DIY Discussions - DIY Chatroom Home Improvement Forum

Go Back   DIY Chatroom Home Improvement Forum > DIY Forum > General DIY Discussions


Thread Tools Display Modes
Old 08-23-2010, 02:08 PM   #1
Join Date: Oct 2008
Location: New Jersey, USA
Posts: 1,402
Rewards Points: 900

New bulb, old fixture - don't work

Just an FYI;

I just bought a 4-pack of CFL bulbs. When I put the first one into a very old (50+yrs) fixture, it didn't light. Tried the second bulb from the same package, it also did not light.
Re-installed older CFL (60W), it did light.

Tried the new bulbs in another fixture; they light.
I looked at the base of the new bulbs, and found that there is no bevel to the contact. This prevented the bulb from working in the old fixture because that fixture's center tab is worn and pushed down.

I'm wondering if the flat contact is the norm for all standard base bulbs, or is it just this brand (I bought them at Home Depot, so I think they are N-Vision, Nu-Vision, or something like that).

When I get a chance, I'll shut off the power at the breaker and pull that old tab up a bit. I will be changing the fixture soon enough though.




Ultrarunner2017 is offline   Reply With Quote
Old 08-23-2010, 02:35 PM   #2
Join Date: Mar 2007
Location: Long Island, NY
Posts: 11,188
Rewards Points: 5,336

The tab in the bottom of the socket has gotten pushed down over time. All you need to do is unplug the lamp or light and pull up the tab so it's off the bottom. When you replace the bulb, turn the light on and screw in the bulb. After it lights up, turn it a bit more. The tab gets shoved to the bottom when you tighten it too much.
Another issue is that some of these cfl's have flat shoulders on the sides and it keeps the contact off the tab, even ones that aren't bottomed out.


Ron6519 is offline   Reply With Quote
Old 08-25-2010, 01:41 AM   #3
Join Date: Jun 2010
Location: rural suburban upstate NY
Posts: 17
Rewards Points: 10

New bulb, old fixture

I had a problem with a CFL stoplight the wouldn't screw in far enough to make contact because the transformer case was too large to clear the outer shell of the outdoor socket. I soldered a spacer to the bottom contact of the bulb and that fixed it. When I had to replace the bulb again, The manufacturer had changed the size of the case so it would fit. I don't know the brands in either case but both were purchased at Home Depot.

Last edited by dave1123; 08-25-2010 at 01:45 AM.
dave1123 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
Tips for Removing GU10 Bulb? djdragan Electrical 5 12-12-2010 09:17 PM
Remove old light fixture (hanging) dj928 Electrical 9 12-02-2009 11:42 AM
Ceiling Fixture Wiring Issue trillen88 Electrical 4 04-13-2009 06:07 PM
can't get new light fixture to work carolcwilson Electrical 24 08-12-2008 12:52 PM
find switch to control outdoor light fixture CaymanAg Electrical 1 07-10-2005 08:43 PM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1