I have been privy to someone tasked with locating and download REVIT lighting families (rfa files (some with txt type catalog files)) from various Manufacturer's web site.
In a word "Un-impressed"
To mention a few common problems . . .
Incorrect electrical type parameter 'values'
Poorly placed lighting source elements
Inability to flex
Lack of reference planes
Poor Symbolic linework not aligned or centered
3D geometry not lining up to with reference planes
3D Geometry not lining up with symbolic lines
Visibility settings not thought through
Detail level settings not thought through
You are better off to scrap the file and start fresh yourself.
Better yet, open one of the 'out of the box' REVIT families and tweak it to your hearts content.
Moral of the story . . . "Learn to Create Your Own Families"
If you know of a web site with quality REVIT lighting families let me know.