CLICK2BIM Blog: https://www.click2bim.com/blog
CLICK2BIM YouTube channel: https://www.youtube.com/channel/UCz2T...
All-Access Subscription: https://learn.click2bim.com

Traditionally, lookup tables in Revit have been used for pipe and conduit fittings. More recently, they are being used for other categories of families. They provide a different functionality than just using formulas. Lookup tables allow for quick population of instance parameters without having to manage multiple family types. They are different than type catalogs. Type catalogs are used to define family types for a specific family whereas the goal with lookup tables is to reduce the number of types needed.