What does "T-3" stand for in GM Headlamps

[camaronut]

Talking to a friend last night and he told me that T-3 means something - like and engineering term, test or something like that.  He said that Mike Joy was talking about that subject during a Barrett Jackson auction broadcast, but can't remember the details...  I know that the T3 headlamps were made by Guide, which was bought by GM in the early days to be a subsidiary of Delco-Remy.

Anyone have a clue?

[Petes L48]

Weren't the filaments tungsten?  Might simply be model number or something like 3rd generation tungsten headlamp.

[camaronut]

Could be......makes sense.

[Chuck-68-Cam]

https://youtu.be/pEmltAXO0cY

[x66 714]

https://youtu.be/pEmltAXO0cY

That was great. Thank you for sharing....Joe

[Mike S]

 Here is more info on Guide:   http://www.delcoremyhistory.com/Allied%20Divisions/guidelamp.htm

Mike

[David K]

Thanks!!

[camaronut]

It would make a great Jeopardy question!  I bet Watson wouldn't know...LOL!