Focal Point Lights
They host their revit files on Bimsmith. Functional professional lights (not very decorative)
Lighting
Acustico Lighting
Cute acoustic lights, but not all have Revit files
Lumetta
DELTALIGHT
Mostly practical, low profile lights. Good files
OCL Architectural Lighting
Mostly modern fixtures - a few retro-looking (schoolhouse, monaco)
RBW
Fun, interesting pendants and sconces. Some paper luminaires (Japanese).
Acuity Brands
Lots of lighting products - very commercial focused. Includes Peerless lighting, Luminis, Mark Architectural Lighting, and Healthcare Lighting. Mostly solid recessed, troffer, linear, suspended, headwall fixtures, etc. Not decorative in general. https://www.acuitybrands.com/resources/technical-resources/bim-downloads
Peerless Lighting
Acuity Brands BIM resources: https://www.acuitybrands.com/resources/technical-resources/bim-downloads
Alcon Lighting
Pretty straight forward LED lights, but they don't provide BIM files (most would be easy enough to create, then add their ies files)
Reggiani Illuminazione
Interesting recessed lighting, nice, modern standard lighting. Not all have revit files.
Santa & Cole
Marset Lighting
Discoco lamp - very organic
Catellani & Smith
Nifty designs - Revit files can be found on archiproducts
Waldmann Lighting
Leucos
Bomma
Fun, dramatic lights - I used the phenomena blown glass orb floor lamp in my hospitality project. Revit files can be found on Archiproducts.
Vistosi
A-N-D decorative luminaire design studio
Geometric and fun, but understated lighting. The "Button" light, for instance, that looks like a giant hanging button. Pipeline series, Vine series (looks like grapes, sort of), Pebble series, Slab series (acoustic).
Estiluz Official
Stylish, playful lighting. You have to register to get access to the 3D files, but once you do, looks like everything is available
In-es.artdesign
Cool moon light, a light that looks like a cheese grater, paint can lights. Many of these lights are available to download in RFA files (found in one big download at the bottom of their site)
Zero Interior
Brokis.cz
Fun, lovely designs, but limited Revit files - some can be found on Archiproducts (for Memory, a "balloon-like" ceiling light). Lots of great designs, though. Perhaps can import sketchup files?
Oblure
Really fun, playful lighting. A few revit files on archiproducts: https://www.archiproducts.com/en/oblure/products/bimtype_revit
Il Fanale
Italian brass lamps
Ross Gardam
You need to fill in a form to request that they send you the 3D Files
Liqui Contracts
Small catalogue of playful lighting
Cameron Design House
Stunning chandeliers, a few of their simpler products have Revit downloads.
Arkoslight
Minimalist, modern light fixtures. Pendants, recessed, track, outdoor. I like the Alaska Trimless - a ceiling mount globe light - small and interesting.
LED Luks
A few of their fixtures are on archiproducts
Utu soulful lighting