I saw this post and remembered that I bought a bag of LED bulbs off of ebay way back to use in the Mustang convertible dash, then lost track of them.   I found them yesterday.  I had taken them out of their package and put them in a baggie... anyways I got one out and crawled under the dash of the Galaxie convertible and pulled the socket out of the clock and whatever these brand of LED bulbs are it brightens and dims fine.   So that means they are out there to be found.   That said, I do not have the packaging.  I can take a picture of what it looks like, if you want,  and I will do some research through my ebay feedback and see if I can figure out where I got them from.    

I have enough of them, I liked it so much, I am going to change out and put them in the Galaxie dash.   

Have you tried superbrightleds.com

They have some great stuff and good info on their sight.  I have an 82 GT and am on some sights for the fox bodies.  Lots of guys only have great things to say about them. Am going to use them when I do my dash lights.
 

Greg B wrote:

... anyways I got one out and crawled under the dash of the Galaxie convertible and pulled the socket out of the clock and whatever these brand of LED bulbs are it brightens and dims fine.   So that means they are out there to be found.      

I have found that the more LED bulbs you put in, the LESS dimmable they become.  Since LEDs use far less energy it takes much MORE energy loss to dim them.  An incandescent bulb or two in the line helps dim-ability a lot. 


 

boomyal wrote:

A question comes to mind.  Do the instrument lights run off of  full 12 volts?... or do they run thru the same voltage reducer as the instruments themselves?

The IVR is for gauges only, all incandescant bulbs are 12v.