What Is Architectural Lighting? Techniques Indoors and Outdoors
Short answer
Architectural lighting makes a building's form, texture and materials legible through light; it is not just light for seeing but a design layer that creates the identity of a space. The main techniques are wallwashing, grazing, uplighting, concealed light and accent lighting; luminaires are chosen together with optics, colour temperature, IP rating and control.
Architectural lighting lights the building itself: the texture of a wall, the rhythm of columns, the form of an arch, the height of a ceiling. General lighting answers 'how much light'; architectural lighting answers 'where will the light fall'. That is why the same design logic works at every scale, from a hotel lobby indoors to a historic façade outdoors.
Main techniques
| Technique | How it is done | Where it is used |
|---|---|---|
| Wallwashing | Asymmetric-optic luminaire 0.5–1 m from the wall | Plain walls, art walls, shop back walls |
| Grazing | Luminaire at the foot of the wall, light skims the surface | Stone, brick, timber, textured plaster |
| Uplighting | Recessed in-ground or short-post luminaire | Columns, trees, façades, arches |
| Concealed light (cove) | Light source hidden in a niche or ceiling coffer | Ceilings, stairs, shelves, under counters |
| Accent | Narrow-beam spotlight or floodlight | Sculpture, entrance, signage, architectural detail |
| Silhouette | The surface behind the object is lit | Columns, trees, landscape |
For the details of wallwashing see our wallwasher guide, and for ceilings and niches our concealed lighting guide.
Architectural lighting indoors
- Lobbies and entrances: general illuminance is kept low and walls and ceilings are brought out with light; focal points such as reception become the brightest area.
- Ceiling lines: decorative linear luminaires or custom shapes draw an architectural line across the ceiling.
- Stairs and corridors: concealed light under steps and grazing light along walls both guide and add depth.
Outdoors and on façades
- Light by material: stone and brick come alive in warm white; with glass and metal, light is aimed at the structure behind rather than the surface itself, otherwise it reflects.
- IP rating: at least IP65 for façade luminaires and IP67 for in-ground luminaires.
- Light pollution: light is directed only at the target surface, not spilled to the sky or neighbouring windows, and dimmed after midnight.
- Landscape and paths: bollards below eye level mark the path without competing with the façade light.
Control: the same building, different hours
Architectural lighting is usually run by scenes: full in the evening, dimmed after midnight, coloured on special days. DALI or an astronomical time switch runs these scenes automatically. For details, see our guide to control systems.
Conclusion
Good architectural lighting picks the strongest features of a building and lights only those. You can see our historic mosque and façade projects on the mosque and historic building lighting page, or request a lighting design for your project.
Frequently Asked Questions
What is the difference between architectural lighting and general lighting?
General lighting provides the even light that makes seeing and working possible. Architectural lighting brings out walls, ceilings, façades and textures to define the form and atmosphere of a space.
What is the difference between wallwashing and grazing?
In wallwashing the luminaire is set back from the wall and the surface is lit evenly, which suits flat, painted surfaces. In grazing the luminaire sits at the foot of the wall and the light skims the surface, revealing the texture of stone or brick through shadows.
Which colour temperature should be used for façade lighting?
On stone and historic buildings 2700K–3000K warm white enriches the material; on glass, metal and concrete 4000K may suit better. The colour temperature is chosen by testing on a material sample.
Does architectural lighting cause light pollution?
If applied badly, yes. Narrow, controlled optics that send light only to the target surface, positioning that limits light spill to the sky, and scenes that dim after midnight reduce light pollution.