Art museums have a very bad reputation with respect to the light. Many of the classical art works were made by day light, but hardly any art works are displayed in day light, often for the fear of UV light causing damage to the paint. Museums are known for using yellow light (between 3000 and 4000K) where daylight is between 5000 and 6500K, this because some experiment showed that visitors preferred the more yellow light for indoor exhibitions. Non dimmed halogen lamps are the best for imitating daylight. These are now replaced by LED lights that claim to be daylight but have spectra with spikes causing some paint mixtures that look the same under daylight as different colors. Also these LED lights are often weak in the IR to red range, cause all red paints to appear dull.

Even if digital pictures of art works are taken with halogen lamp set to 6000K the pictures might look very different from what people are expecting them to be, because they differ so much from the light conditions that these are works are put on display.