Waldmann Lighting
Catellani & Smith
Nifty designs - Revit files can be found on archiproducts
Marset Lighting
Discoco lamp - very organic
Santa & Cole
Reggiani Illuminazione
Interesting recessed lighting, nice, modern standard lighting. Not all have revit files.
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)
Peerless Lighting
Acuity Brands BIM resources: https://www.acuitybrands.com/resources/technical-resources/bim-downloads
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
RBW
Fun, interesting pendants and sconces. Some paper luminaires (Japanese).
OCL Architectural Lighting
Mostly modern fixtures - a few retro-looking (schoolhouse, monaco)
DELTALIGHT
Mostly practical, low profile lights. Good files
Lumetta
Acustico Lighting
Cute acoustic lights, but not all have Revit files
Focal Point Lights
They host their revit files on Bimsmith. Functional professional lights (not very decorative)
Visa Lighting Company
Eureka Lighting
Nice, slick, modern lights - lovely, innovative track lighting.
Axis Lighting
Lots of nice, basic lights: pendants, linear, troffer, wall, cove, track, spot, wall washers, some interesting "sky boxes" and sculpted forms recessed lights.
XAL
USAI Lighting
a-emotional light
Ethereal looking lights - very spa-like. Some of their lights are in Revit.
Craftmade
meh
Currey and Company
meh
Chelsom Lighting
Yellow Goat Design – Lighting
KDLN
Nice, interesting designs. Playful and modern.
Cooper Lighting
Signify company - very trusted with lots of specialized lighting solutions (healthcare, for instance). Nice files. Less decorative, more functional.
Arktura Lighting
Arktura is a great ceiling/wall acoustics company, but I've added the lighting section here because it's innovative in this aspect (especially around unique "troffer" solutions in acoustic ceilings and walls)
Luxxbox
Really fantastic acoustic lighting. I've used Birdcage in a project.
Kendal Lighting
Brownlee Lighting
Stylish, basic lighting (modern and minimalist). Acoustic versions and healthcare-friendly. Some art deco looking ceiling lights.