Brass in lighting: shine, patina and warmth
Brass catches light like few other metals and changes with every year it is touched. Here is what it is made of, how its finishes differ and whether to polish it or let it age.
Brass warms a room even when the lamp is switched off. A brushed stem catches the daylight, a polished shade throws back a soft golden reflection, and an old switch, smoothed by years of fingers, tells you how long a lamp has been loved. Designers keep returning to it because it is beautiful when new and, many would argue, even more beautiful when old.
Copper, zinc and a golden colour
Brass is an , a blend of metals, made from copper and zinc, usually with about twice as much copper as zinc. Changing the balance changes the metal: more copper makes brass softer and more golden, more zinc makes it harder and paler, with a slightly silvery tone. Small additions of other metals can adjust its strength and resistance to corrosion.
For lamp makers, brass is also wonderfully practical. It is more malleable than bronze and melts at around 900 to 940 °C, which makes it relatively easy to cast. It can be spun into shades, folded from sheet, turned on a lathe into stems and knobs, or cast into heavy bases, and it machines cleanly into fine threads and joints.
Why designers love it
Brass reflects light warmly. Chrome and steel give a cool, crisp reflection, while brass tints it golden, so a polished brass reflector or the inside of a brass shade adds warmth to the light itself. It also sits happily beside the materials that matter in interiors: , marble, walnut, linen and deep painted walls.
Its place in lighting history is secure. In Finland, Paavo Tynell, a co-founder and the main designer of the company Taito, combined brass and glass in light fittings that were often decorated with perforated patterns. In post-war Italy, makers such as Arteluce and Stilnovo used brass for stems, joints and reflectors, giving mid-century lamps their characteristic blend of colour, metal and lightness.
Contemporary designers continue the line. Michael Anastassiades’ IC Lights for Flos, launched in 2014, balance an opal glass sphere on the edge of a slender rod, and the brushed brass version has become one of the most recognisable lamps of recent years.
Polished, brushed, lacquered or raw
The finish matters as much as the metal. Each one reflects light differently and ages in its own way:
- Polished brass: mirror bright and highly reflective, it throws sharp golden highlights and shows fingerprints quickly.
- Brushed or satin brass: fine parallel lines soften the reflection into a calm sheen that hides small marks.
- Lacquered brass: a clear protective coating seals the surface, so it keeps its colour for years as long as the stays intact.
- Unlacquered brass: often called a living finish, it is left bare so it darkens and develops a with time and touch.
- Antiqued or aged brass: darkened chemically at the factory to look old from the start, usually sealed to fix the effect.
How patina develops
Bare brass reacts with the air around it. The copper in the alloy reacts with sulphur compounds and slowly forms a brown, then darker film; moisture, skin oils and household fumes speed the process along. In damp conditions, a green or blue-green layer can appear, the colour familiar from old copper roofs.
A patina is not damage. On a lamp it usually settles unevenly, lighter where hands touch the switch or the arm and darker in recesses, which gives a piece depth and history. The brown film can even help protect the metal beneath. Green spots, however, point to moisture and are worth cleaning away early.
A patina is not damage: it is the record of every hand that has turned the switch.
Clean it or let it age
The choice is personal, and both are right. If you love bright brass, clean unlacquered pieces regularly with a soft cloth and a dedicated brass polish, following the grain on brushed surfaces. Always switch the lamp off and unplug it first, and keep liquids well away from the bulb holder and the wiring.
If you prefer an aged look, simply dust the lamp and wipe fingerprints away with a dry cloth. Within months, unlacquered brass darkens to a soft, honeyed tone. Restoring a heavily tarnished vintage lamp is perfectly possible, but if it needs rewiring at the same time, leave that part to a qualified electrician.
Brass and warm light
Brass looks its best in warm light. A bulb of 2,700 K, a warm white on the Kelvin scale that measures how warm or cool light looks, draws out its golden tones, while a cool daylight bulb can make it appear greenish and dull. In a room with several brass fittings, keep all the bulbs at the same colour temperature so the metal reads consistently.
Mixing finishes works well when it looks deliberate: a brushed brass floor lamp beside a polished brass wall light, or an aged brass pendant over a table with darker bronze details. The common thread is warmth, which is what brass, more than any other lamp metal, brings to a room.
glaminia is independent and does not sell lamps or recommend dealers. Images are AI generated illustrations, not photographs of specific products. Have fixed electrical work done by a qualified electrician.
