Hi,

My first post here...  I am renovating a basement and came across some fluorescent fixtures.  I am unsure of the make of the fixture, but each had 4 x holophane 11f12 diffusers in them.  They are ribbed glass and in great shape.  I am not familiar with these types of fixtures or diffusers but thought I would post to see if these are of any value or anyone is interested in them.

These are some nice fixtures, and are worthwhile to keep or sell. 
Are they T12 or T17?

Thanks.  I am not sure what T-12 or T-17 even means... is there an easy way for me to find out??

Thanks.  I am not sure what T-12 or T-17 even means... is there an easy way for me to find out??

T 12 is 12/8 inch diameiter tubes or 1 1/2 diameter tubes. T17 lamps are 2 1/8 diameter tubes. A ruler can help you measure them and the etch has info too.

Sorry... new to this.  Looks like they are T-12.

Sorry... new to this.  Looks like they are T-12.

Its ok, we where all noobs to this bulb hobbie one day or another.

Agreed, these are some pretty nice fixtures, especially since they're the older preheat style fixtures which are more collectible I would say compared to a more modern fluorescent fixture. The glass diffuser is rarely seen nowadays too.

Well, if anyone is interested let me know.  I don't have a plan to keep them.