Lighting a painting at home: colour temperature, angle and intensity that respect the canvas

White light is never neutral. At 2700 K it leans amber, like a filament bulb; at 4000 K it is a soft daylight white; at 6000 K a bluish office white. A canvas with a warm dominant, ochres, browns, deep reds, gains depth under 2700 to 3000 K: colours saturate and the paint's grain appears.

A cooler or more contrasted canvas, with whites, greys, blues, stays truer under 4000 K, where whites do not yellow. 6000 K is for cleaning: it flattens everything, brings out reflections on the paint layer and tires the eye. On a warm-toned acrylic like Saxophone, switching from 4000 to 2700 K shows immediately: the mood changes, not only the lighting.

Light hitting the canvas head on, horizontally, creates a reflection on the painted surface and erases relief. Light coming too much from above, almost parallel to the wall, casts the frame's shadow on the canvas and grazes the surface. The right compromise sits around 30° from the wall's vertical: light reveals the material without shimmering.

With a central ceiling light, that angle depends on the distance between the light and the wall. For a canvas hung at 1.45 m centre height in a 2.50 m room, a ceiling light 1.50 to 2 m from the wall gives an angle close to ideal. Closer to the wall the frame's shadow lengthens; further away the light becomes frontal but stays soft if dimmed.

An overexposed painting loses its nuances: light tones wash out and blacks turn grey. The gallery principle is simple: the canvas should be perceptibly brighter than the wall around it, without becoming the brightest source in the room. At home with a dimmable ceiling light that means 40 to 60% of power in the evening, 100% in the day when natural light dominates.

What matters more than the exact value is being able to adjust. A canvas lives differently at 6 p.m. and at 10 p.m. The Boréal 107 LED dims and changes white from the remote: 4000 K at 100% to show the canvas to guests in late afternoon, 2700 K at 40% for the evening. The same wall, two paintings.

Acrylic pigments are stable, but no pigment likes continuous UV. A canvas in full sun a few hours a day loses saturation within a few years, starting with the reds. The rule: no wall exposed to direct sun, or a light curtain at the harshest hours. Halogens close to the canvas pose another problem, heat, which dries the paint layer.

LED settles both: almost no UV, almost no heat. An LED ceiling light is, from that point of view, gentler on a canvas than a gallery halogen spot. A unique canvas keeps for decades in those conditions, with a dry-brush dusting twice a year.