Welcome to the The Garage Journal Board forums.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us.

Go Back   The Garage Journal Board > The Garage > Lighting & Electrical

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Search this Thread Display Modes
Old 07-30-2011, 10:16 PM   #1
strnjss
Senior Member
 
Join Date: Jul 2010
Location: Boston Area
Posts: 320
Default Halogen bulb T2.5 vs T3

Hi, I just purchased a replacement halogen bulb for a fixture. What I didn't notice was the new one I got is a T3 halogen 150W bulb, and my old one was a T2.5 150W bulb.

They both look identical, they seem to be the exact same shape, length, ratings etc.

My first question is, what does the T mean? What's the difference between 2.5 and 3?

Also, can I use the T3 bulb I got even though my original bulb was a T2.5?

Thanks!
strnjss is offline   Reply With Quote
Old 07-31-2011, 12:04 AM   #2
Greatbear
Senior Member
 
Greatbear's Avatar
 
Join Date: Jan 2008
Location: Columbia/Fulton, MD
Posts: 1,675
Default Re: Halogen bulb T2.5 vs T3

Double check the base of the bulbs. If they are the type with pins, the spacing of the pins could be different.
Greatbear is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 07-31-2011, 01:04 AM   #3
strnjss
Senior Member
 
Join Date: Jul 2010
Location: Boston Area
Posts: 320
Default Re: Halogen bulb T2.5 vs T3

Well, they look pretty much identical. I put the T3 into the fixture that the T2.5 came from, and it fit fine, it also works fine too.

They are J-type bulbs, like this:



both seem to have the same ends too.

There must be a difference between the two, but I just don't know what.


I wonder that the T designates?
strnjss is offline   Reply With Quote
Old 07-31-2011, 06:27 AM   #4
BTC
Senior Member
 
Join Date: May 2011
Location: Lansing, Michigan via Kentucky, Georgia & Tennessee
Posts: 304
Default Re: Halogen bulb T2.5 vs T3

I believe the T designates the bulb as tubular and the number is the diameter size in eighths of an inch.
BTC is offline   Reply With Quote
Old 07-31-2011, 11:30 AM   #5
strnjss
Senior Member
 
Join Date: Jul 2010
Location: Boston Area
Posts: 320
Default Re: Halogen bulb T2.5 vs T3

thanks that makes sense.
strnjss is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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

Forum Jump

Sponsored Links (Register now to hide all advertisements)


All times are GMT -5. The time now is 06:06 PM.