EXPERT GUIDE | Lighting different wall materials

Great lighting design starts with the architecture, not the luminaire.

Successful lighting design begins long before the first luminaire is selected.

Creating a balanced and visually comfortable space requires much more than choosing a luminaire that looks good on the ceiling. The materials used throughout the interior have just as much influence on the final result as the lighting itself.

Wood, polished marble, exposed concrete, painted plasterboard, glass and textured wallpaper all interact with light differently. Some surfaces absorb light, while others reflect it. Some become richer when illuminated with directional light, while others reveal every imperfection if the wrong lighting technique is used.

That is why lighting design should never begin with the question, which luminaire should I choose? Instead, it should begin with what materials am I lighting?

Once you understand how a material reacts to light, selecting the right optics, beam angle, glare control and colour temperature becomes much more intuitive.

Wood

Natural wood is one of the most forgiving materials to illuminate.

Unlike polished surfaces, timber has a relatively low reflectance. It absorbs a considerable amount of the incident light while softly scattering the remainder. Instead of creating bright reflections, it produces a warm and comfortable appearance that highlights the natural grain and texture.

Because wood does not create strong specular reflections, designers have more freedom when choosing luminaires.

Design considerations

• Warm white light, such as 2700K or 3000K, enhances the natural warmth of timber.
• High CRI preserves subtle colour variations and grain.
• Narrow and medium beam angles work well for highlighting texture.
• Grazing light creates beautiful depth on timber slats or structured wooden panels.
• Low-glare optics are always beneficial, but reflections from the wall itself are usually not the primary concern.

Marble

Marble behaves almost opposite to wood.

A polished marble surface reflects a large portion of the light striking it. Depending on the finish, it can easily produce bright highlights and mirror-like reflections that immediately attract attention.

At the same time, natural marble allows light to penetrate slightly beneath the surface before scattering back, giving the stone its unique visual depth.

Because of these characteristics, both luminaire selection and aiming become far more critical.

Design considerations

• Prioritise luminaires with excellent glare control and deep recessed optics.
• Carefully position luminaires to minimise unwanted reflections.
• Medium beam angles often create a softer and more elegant appearance than very wide beams.
• Warm marble is generally complemented by 3000K, while white and grey marble often work well with 3500K or 4000K.
• High-quality optics help create clean, controlled illumination without distracting hotspots.

Architectural Concrete

Concrete is a matte material with a naturally textured surface.

Rather than reflecting light directly, it scatters light while allowing shadows to define its texture. This means that the angle of the light often has a greater influence than the beam angle itself.

Even small changes in luminaire position can dramatically change how the concrete appears.

Design considerations

• Use grazing light when the goal is to reveal texture.
• Adjustable spotlights provide maximum flexibility.
• Wallwashers create a flatter and more uniform appearance if texture should remain subtle.
• 3000K creates a warmer industrial atmosphere.
• 4000K enhances the clean, contemporary appearance of exposed concrete.

Painted Plasterboard

Painted plasterboard often appears perfectly smooth until the lighting is installed.

When illuminated at a shallow angle, even high-quality plasterboard can reveal joints, filler lines, sanding marks and minor imperfections that remain invisible under daylight.

This is why lighting techniques that work beautifully on concrete are often unsuitable for plasterboard.

Design considerations

• Wallwashers usually provide the cleanest result.
• Wide beam optics reduce the visibility of imperfections.
• Avoid strong grazing unless revealing texture is intentional.
• Consistent colour quality is particularly important on large white surfaces.

Brick and Natural Stone

Brick and natural stone are full of depth and texture.

The beauty of these materials lies in their irregular surfaces, joints and relief. Lighting should enhance these characteristics rather than flatten them.

Directional lighting can completely transform a stone wall by creating natural shadows that reveal every detail.

Design considerations

• Narrow and medium beam spotlights enhance texture.
• Wall grazers are ideal for highlighting relief.
• Warm white light often complements traditional brick and sandstone.
• Neutral white can reinforce the contemporary appearance of natural stone.

Glass

Glass is one of the most challenging materials in architectural lighting.

Unlike wood or concrete, glass rarely reveals its own surface. Instead, it reflects everything around it, including luminaires, windows and people.

As a result, the quality and position of the luminaire become more important than its lumen output.

Design considerations

• Use luminaires with excellent glare control.
• Deep recessed optics help minimise visible reflections.
• Position luminaires outside normal viewing angles whenever possible.
• In many applications, it is more effective to illuminate the objects behind the glass than the glass itself.

Textured Wallpaper and Decorative Finishes

Decorative wall coverings respond differently depending on their finish.

Smooth wallpaper generally benefits from soft, even illumination that preserves colour and avoids unnecessary shadows.

Textured wallpapers, fabrics and decorative wall panels often become much more expressive when illuminated from the side. Grazing light reveals their relief and creates a rich three-dimensional appearance.

Design considerations

• Wallwashers are ideal for smooth finishes.
• Adjustable spotlights work well on textured surfaces.
• Grazing light enhances relief and creates depth.
• Select a colour temperature that complements the interior palette rather than dominating it.

Quick Reference Guide

The Material Should Influence the Luminaire

Choosing a luminaire is not only about aesthetics, light output or beam angle.

The same spotlight can create completely different results depending on the surface it illuminates. A beam that beautifully enhances the texture of concrete may expose every imperfection in plasterboard. A luminaire that performs perfectly on timber may create disturbing reflections on polished marble.

For this reason, the wall material should always be part of the lighting design process.

By understanding how different materials absorb, scatter and reflect light, designers can make informed choices about optics, beam angle, glare control and colour temperature. The result is lighting that supports the architecture, enhances materiality and creates spaces that feel natural, comfortable and visually balanced.