ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
Single phase VS three phase generator
by 3nd4. 01/24/18 05:53 AM
AreMetal Ladders Ever OK For Electrical Work?
by HotLine1. 01/22/18 07:31 PM
by twh. 01/22/18 05:06 PM
VDE 0100 to introduce AFCIs
by sparky. 01/20/18 05:09 PM
New in the Gallery:
Housebilding DIY wiring
SE cable question
Who's Online Now
0 registered members (), 4 guests, and 8 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
"four tube flange type flourescent light" #49380
03/05/05 03:49 PM
03/05/05 03:49 PM
sparkync  Offline OP
Joined: Oct 2002
Posts: 830
I have installed the 2 tube flange type flourescent light before, but I have a need of installing 6 four tube recess flanged type lights in sheetrock. The ceiling joist are 2ft. on center. I called my supply house and they said the dimensions were just like a "lay in light". Since the ceiling joist are 2 ft. on center, a full 24 inches wouldn't work unless this dimension is for the trim only, then the "body" of the fixture tapers off, so it will fit in between the ceiling joist. Has anyone installed these type before? Do they fit in between the 2 ft. ceiling joist?
Called another lighting place and they said the measurements were 23 1/2 X 48 1/2 . Surely they would make one that would fit in between regular ceiling joist. Thanks for the help. Steve.

Work Gear for Electricians and the Trades
Re: "four tube flange type flourescent light" #49381
03/05/05 05:53 PM
03/05/05 05:53 PM
HotLine1  Offline

Joined: Apr 2002
Posts: 6,919
Brick, NJ USA
You hit a good point. We have put in a few over the years. They come in two parts, a frame, and the fixture body. Can't really say what the dimensions are/were exactly. We do all comm work, 99% is sheetmetal framing. 24" o/c framing usually has a rough 22-1/2" space. Catalog I have now says width 23-3/4"; mounting brackets fully adjustable over 3-1/4" range from within installed fixture. BTW, the 23-3/4" is the same as a 2x4 lay-in.


Re: "four tube flange type flourescent light" #49382
03/05/05 06:48 PM
03/05/05 06:48 PM
HLCbuild  Offline
Joined: Dec 2004
Posts: 209
Herndon,Va USA
I've done this in the past with a Mobern Electric Corp recessed flanged 4 ft x 1 ft 4 lamp fixture. It fit betreen 16" oc joists and is flanged for the drywall. Model # RF121-440E (

Re: "four tube flange type flourescent light" #49383
03/05/05 07:28 PM
03/05/05 07:28 PM
George  Offline
Joined: Feb 2002
Posts: 375
It could be worse:

3-1/2" flanges on I-joists with 24" spacing only leaves 20-1/2".

Re: "four tube flange type flourescent light" #49384
03/05/05 09:43 PM
03/05/05 09:43 PM
sparkync  Offline OP
Joined: Oct 2002
Posts: 830
Anybody know a picture and specifications on the web here anywhere. I went to Lithonia, but I can't find one in their catalog or on the net. I must be missing it somewhere. I really need to find some dimensions and specs before Monday if I can. The 1 X 4's that I've done in the past, came with the flange and body together, no adjustments. I guess the 23 1/2 spec's that I was given would squeeze into the 22 1/2 " opening if it wasn't for the sheetrock will already be nailed which will hold the ceiling joist secure with no "give". I'm guessing it will work, but would like to know for sure. I don't like the idea of "beating it in there" if you know what I mean. What's the good of having a fixture you can't use? You can't cut a ceiling joist legally and pratically [Linked Image] There's gotta be something I'm missing here somewhere.. Thanks again.. Steve

Re: "four tube flange type flourescent light" #49385
03/06/05 04:53 PM
03/06/05 04:53 PM
LK  Offline
Joined: Jan 2003
Posts: 1,429
New Jersey
When we order this type of fixture, it usually takes 4 to 6 weeks to get them.

Try this site for more info on this type fixture,


2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman


Member Spotlight
Posts: 27
Joined: December 2004
Show All Member Profiles 
Top Posters(30 Days)
Admin 20
sparky 15
Popular Topics(Views)
243,607 Are you busy
180,425 Re: Forum
170,876 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.018s Queries: 14 (0.003s) Memory: 0.9755 MB (Peak: 1.1207 MB) Zlib enabled. Server Time: 2018-01-24 11:48:21 UTC