In short
Trimless lighting is recessed and plastered into the ceiling or wall so there is no visible frame, leaving only a clean line or disc of light.
Trimless lighting removes the one detail that usually gives a recessed light away: the trim. Instead of a flange sitting on the ceiling, the fitting is plastered in so the light appears to be cut out of the surface.
How it differs from standard recessed lighting
A standard recessed fitting covers its cut-out with a visible flange. A trimless fitting uses a plaster-in profile or frame that is skimmed over, so the ceiling runs right up to the light.
Types of trimless lighting
- Trimless linear profiles for lines and shapes
- Trimless downlights, including large discs
- Trimless wall and cove details
Why architects specify it
- A seamless, gallery-like ceiling
- Light that reads as part of the architecture
- Lines and shapes that follow the design
What it needs
Early coordination with the drylining contractor and a planned installation sequence. See our detailing guide.
Further reading at 299 Lighting
Planning a trimless ceiling?
Send us your reflected ceiling plan. We'll come back with a shortlist, plaster-in details and lighting calculations.
Start a project →Frequently asked questions
What does trimless mean in lighting?
Trimless means the fitting has no visible flange or frame. It is plastered into the surface so only the light is visible.
Is trimless lighting the same as plaster-in lighting?
Yes. The terms are used interchangeably.
