The National Gallery uses the Sunley Rooms on the ground floor to host exhibitions which focus on a particular masterwork and place them in a broader historical and biographical context. Following a very enjoyable show about Constable and The Hay Wain comes this show, which looks in detail at Joseph Wright of Derby’s ‘candlelight’ paintings.
The show brings together two of Wright’s really big masterpieces, along with 8 or so related but smaller candlelight paintings, a dozen or so mezzotint prints showing how he had his work popularised and made accessible, and some fascinating objects – an orrery, an air pump, a model perspective. There are some 20 artefacts in all, which fascinatingly set the masterworks in their biographical, artistic and historical contexts.
Just the opportunity to see a group of Wright masterpieces hanging in the same space, to read the wall labels, go off and examine the other, lesser works, then come back to the masterpieces with a fresh eye and a deeper understanding, is a marvellous experience. Here are the two big masterpieces in chronological order:
Gallery
1766: ‘A Philosopher giving That Lecture on the Orrery in Which a Lamp Is Put in the Place of the Sun’

‘A Philosopher giving That Lecture on the Orrery in Which a Lamp Is Put in the Place of the Sun’ by Joseph Wright of Derby (exhibited 1766) © Derby Museums
1768: ‘An Experiment on a Bird in the Air Pump’

‘An Experiment on a Bird in the Air Pump’ by Joseph Wright of Derby (1768) © The National Gallery, London
Themes
Biography
Joseph Wright was born in Derby in 1734 to a respectable family of lawyers. Aged 17 and already knowing where his talents lay, he travelled to London where he became apprentice to the established society painter, Thomas Hudson (teacher of the young Joshua Reynolds), who he worked under until 1757. It was then he returned to Derby to establish himself as a portrait painter to the local wealthy clients.
All the works in this exhibition are from the crucial eight-year period between 1765 to 1773 when he made all his candelight works. In the latter year Wright set off for an extended visit to Italy which he spent concentrating on landscapes. When he returned, he moved to Bath in an effort to become a fashionable portrait painter. The spell was broken. He never regained the heights of his great candlelit works.
Science and Enlightenment
The Enlightenment is the name given to the intellectual and cultural movement in Europe during the 18th century that emphasised reason, logic, and science over faith and tradition. Also called the Age of Reason, it promoted ideals like liberty, equality and individual rights, and led to revolutionary changes in philosophy, politics, art and science. In Europe the movement is associated with names like Voltaire, Rousseau, Montesquieu and Immanuel Kant but Britain played a surprisingly large role, with leading figures of a new kind of rational, scientific, objective learning including John Locke, David Hume and Adam Smith. Towering over all of them was the great figure of Sir Isaac Newton from the previous century, who had established clear understandable laws which underpinned everything from the workings of gravity to the movements of the planets in the solar system, and the composition of white light from the colours of the spectrum.
The Midlands Enlightenment
Closer to home in the English Midlands, two of Wright’s most important patrons were Josiah Wedgwood (credited with the industrialization of pottery manufacture) and Richard Arkwright (creator of the factory system in the cotton industry). Wright also had connections with Erasmus Darwin and other members of the Lunar Society, which brought together leading industrialists, scientists and philosophers. Although meetings were held in or near Birmingham, Erasmus Darwin lived in Derby and some of Wright’s paintings were inspired by Lunar Society gatherings.
Scientific demonstrations
Advances in engineering and manufacturing made the creation of scientific devices easier and more available. Public demonstrations were held and wealthier families could buy and understand machines which worked on scientific principles. Wright’s most famous paintings depict two of these:
- an air pump (used to pump air out of the glass bowl and so asphyxiate any create – in this case a bird – trapped in it)
- an orrery (a mechanical model of the solar system)
The exhibition actually includes an antique air pump like the one depicted in the picture, and an antique orrery, so we can get a grasp of their size and presence.
Tenebrism
BUT one of the key facts that comes over in the exhibition is that demonstrations of devices like this, either in public spaces or in private homes, usually took place during the day. A moment’s thought makes you realise it would be much easier for everyone to see what was going on in the plain light of day.
The decision to depict these wonderfully ornate inventions being put through their paces by candelight was entirely Wright’s and was an entirely artistic decision. He was very consciously (and successfully) implementing the style known as tenebrism. What is tenebrism? Google AI tells us that:
Tenebrism is a painting style characterised by extreme contrasts between light and dark, where figures are illuminated by a single, harsh light source against a predominantly dark or black background. Derived from the Italian word tenebroso meaning ‘dark’, tenebrism creates a dramatic, theatrical and intense effect by plunging most of the canvas into shadow. The style was popularized by Baroque-era painter Caravaggio (1571 to 1610) and his followers.
I’d heard of chiaroscuro, which is the use of strong contrast between light and dark to create drama; tenebrism is its more extreme cousin, chiaroscuro taken to extremes.
Wright of Derby is famous because he made extreme chiaroscuro his schtick or brand. In a competitive art world, he quickly emerged as the master, in England, of this approach. The exhibition includes half a dozen other medium-sized works where Wright uses tenebrism to dramatic and striking effect. A couple rival the big two masterworks and are: An Academy by Lamplight (1769) and ‘Three Persons Viewing the Gladiator by Candlelight’ from 1765.

Joseph Wright ‘of Derby’, ‘Three Persons Viewing the Gladiator by Candlelight’, 1765, Private Collection. Photo © National Museums Liverpool
The source of light
Notice something about them? In all three, the light source – the lamp – is hidden. This is one element which creates a sense of mystery in the pictures. But the more obvious one is the way the single, small source of light creates a very dramatic contrast between centres of light and the surrounding darkness and this has all kinds of consequences and meanings.
The meaning of light
At its biggest, meta level, light had been associated for 1,760 years with Christianity which is rich in light metaphors. The ancient Jewish scriptures begin with God creating Light as the primal element, and the New Testament also describes Jesus as the light of the world. Building on this, countless western philosophers and writers associated light with knowledge and clarity and wisdom, contrasted with the darkness of ignorance and barbarism.
Indeed the metaphor is embedded in the very word Enlightenment which intellectuals across Europe used to describe the movement away from religious obscurantism and bigotry and towards reason and science (Aufklärung in German, éclaircissement in French).
So this is one of the things being dramatised in these paintings. The light of knowledge (of not just science as in the big two, but of aesthetic appreciation as in the gladiator and nymph paintings) is restricted to a few initiates, and beyond this magic circle is darkness and ignorance.
Wright’s painting dramatise the getting and having of knowledge. They dramatise learning and scholarship, light and reason against ignorance and darkness.
Light and sight
But the paintings also dramatise relationships among this knowledgeable elite. This can be explained most simply by thinking about the characters in the paintings as types. Thus the gladiator painting shows three different connoisseurs examining the gladiator but, to state the obvious, they are doing it from different perspectives. Even though they’re looking at the same object, they’re looking from different points of view, they are seeing different things.
The curators point out that Enlightenment philosophers were developing the notion that the mind was not the blank sheet of paper posited by the 17th century philosopher John Locke, but instead speculated that seeing is an active, creative process. The human mind is not a passive blank sheet, but proactively creates and elaborates and lends meaning to everything it sees.
So Wright’s paintings can also be seen as a dramatisation of this new idea. Different people, looking at the same object, see different things and react differently.
The ages of man
Another aspect of this is the notion that, in these paintings, Wright deliberately depicts different types and ages of people. To start simply, with the gladiator painting, the three men can be taken, from left to right, as old, middle-aged and young: wise old expert, middle-aged connoisseur, and young neophyte.
With this idea that the pictures depict types of ages in mind, look again at the air pump picture. You can now see that it’s packed with people, no fewer than ten, and that they present an almost allegorical typology of human age groups: the smallest girl, the older girl, a boy on the left, a single young man next to him (the young learner), a courting or married couple, the middle-aged expert reassuring the girls, and then the wise old natural scientist conducting the experiment. It’s a cross-section of ages and life stages.
The stages of knowledge
In fact, to go a step further, you could argue that the paintings depict different stages of knowledge. If you look again at the orrery painting, you could say that there is a kind of hierarchy of knowledge, with the two children delighted by a shiny toy, the young woman on the left knowing it’s important but puzzled (?), the young man on the right having brainy thoughts, the old master at the top and back having total control of the situation, and making observations to his experienced but subservient assistant on the left who is learned enough to take notes.
Composing with light
These paintings contain these almost allegorical levels of meaning and yet, what makes them masterpieces is the way all these figures are arranged so that the scenes feel perfectly natural. Or, more accurately, feel perfectly staged, all the figures artfully arranged so as not only to highlight the central action and the piece of scientific paraphernalia, but to maximise the play of the bright lamplight on the folds of their clothes and the contours of their faces.
The rise of sentiment
Arguably, the first half of the 18th century was the Age of Reason in art and literature. In England, poetry was dominated by the harshly satirical poems of Alexander Pope, who died in 1744, and his equivalent in the art world was William Hogarth, with his virulent satires of contemporary English society.
Wright quite obviously comes from a different generation than them. By the 1760s, when he produced his masterpieces, their pure and harsh rationalism had been replaced by a new focus on sentiment. This wasn’t as vague as it sounds. Philosophers like Jean-Jacques Rousseau (1712 to 1778) in France and David Hume (1711 to 1776) in Britain, insisted that human beings are not the passionless calculating machines of a pure rationalism, but in fact are strongly swayed by sentiment and emotion. In fact they both assign the basis of morality not to pure reason, not to a calculation of moral principles and courses of action, but to how we feel and respond emotionally to situations.
Hence the drama at the heart of the air pump painting. The girls are upset and the older one is hiding her eyes because they’ve just learned that the point of the experiment is to extract the air from the glass bowl and thus asphyxiate – kill – the bird.
The middle-aged man with his arm round her is, presumably, explaining how the machine works and the scientific principles it demonstrates and so on, but it’s not comforting the girl, is it? All she knows is the philosopher is about to kill a poor defenceless creature and that her father (?presumably) is acquiescing in this horrible deed.
Thus the painting is using tenebrism not just to make a demonstration of an air pump more dramatic – but to dramatise a fundamental issue of the day, which is the clash between scientific knowledge-reason, and the newer, gentler culture of sentiment and feeling.
Who is right? Do we have the right to kill defenceless creatures in the name of science and learning? It’s a question which resonates right down to the present day.
The new sensitivity to children
It’s fascinating to learn from the wall labels that all Wright’s sketches and notes which survive show that right from the start it was the position and posture of the girls which was central to his conception, and not the standing figure of the natural philosopher or scientist who, at first glance, appears to dominate. They are closest to, and most illuminated by, the hidden lamp.
This, also, reflected the most advanced thinking of the day. While most children in the eighteenth century lived in poverty and were sent out to earn a living from the earliest years, in the households of the enlightened, of the middle-class followers of enlightened thinking, a new way of thinking was taking hold, one which recognised that childhood is a special, vulnerable and fragile period in a person’s life.
The classic text for this is Jean-Jacques Rousseau’s Confessions (1770) which elaborated more than any writer had done before, how deeply children feel and how childhood experiences completely shape the adult we grow into.
Although written after Wright’s major paintings, in a sense Rousseau was simply giving voice to a feeling which had become widespread by the 1760s about the complex and sensitive nature of children’s feelings. The point being that the air pump painting is a classic expression of this new feeling (among the enlightened) for the validity of children’s sensitive and finer feelings.
Previous generations thought we adults had to thrash silly and wanton behaviour out of children. This new age, by complete contrast, thought we might be able to learn from the purity and innocence of children’s feelings, how to be better, more moral persons ourselves.
Again, this huge and complex debate is dramatised in the air pump painting: should we ignore a child’s naive and innocent response to some adult action we feel is necessary to carry out? Or should we acknowledge that we, the adults, have maybe lost our moral bearings and need to reconnect with our own finer feelings in order to create a better world? This, also, is still very much a live debate.
Wright’s portraiture
That’s probably enough stuff for you to take in. It was certainly an overflow of information for me to absorb as I read the wall labels of this fascinating and deeply rewarding exhibition. But I haven’t made the last, big, obvious point which is that, all these fine ideas, all these issues and debates may well be contained within the pictures, but they wouldn’t have the impact they do if it wasn’t for the fact that Wright was a painter of genius. Not just in his handling of complicated compositions and the immense skill of his tenebrism – but in his faces.
The faces of the two men behind the orrery and of the two girls leaning towards it, are complete genius. Beside the wall panel which explains the meaning and history of tenebrism, the exhibition places half a dozen paintings by other Old Masters who deployed, including the master, Caravaggio, of course, but also Rembrandt, famous for his use of chiaroscuro. The Rembrandt painting they choose is Belshazzar’s Feast dating from 1638.
Now I’m sorry to be a philistine but I don’t actually like Rembrandt very much because I think he was a very poor painter of people’s faces. The overall composition, the dramatic use of dark and light, yes. But the faces of the old man, the women next to him and the king himself all look like bug-eyed cartoons.
Compare and contrast with Wright’s faces. Wright’s people come over as extraordinarily vivid and real. You can imagine them just about to open their mouths and speak to us. I can hear the Midlands accent of the grey-haired man on the right.

Detail of ‘A Philosopher giving That Lecture on the Orrery in Which a Lamp Is Put in the Place of the Sun’ by Joseph Wright of Derby (exhibited 1766) © Derby Museums
Nowhere more obviously than in the face of the air pump lecturer, surely one of the most characterful faces in art and rightly chosen as the lead image for the exhibition and all its promotional material.

Detail of ‘An Experiment on a Bird in the Air Pump’ by Joseph Wright of Derby (1768) © The National Gallery, London
This is a supernaturally brilliant portrait and an apt motto for this wonderful, beautifully designed, richly informative and deeply pleasurable exhibition.
Related links
- Wright of Derby: From the Shadows continues in the Sunley Rooms at the National Gallery until 10 May 2026
Related reviews
- Gainsborough’s Family Album @ the National Portrait Gallery (January 2019)
- Gainsborough: A Portrait by James Hamilton (2017)










