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Permanent light

A steady light is a type of lighting technology that, unlike a photographic flash, shines continuously. Its main advantage is that the photographer or videographer can see the lighting of the scene in real time. It is possible to observe how shadows form, where reflections occur and how the light sculpts the subject or person in general, right on the scene, even before the footage is captured. This principle can be described as "what you see is what you get". It is because of its nature of continuous illumination that this type of light is essential for shooting video where constant lighting is key. There are several parameters that are monitored with continuous lights. One of these is the wattage, which determines the intensity of the light and can often be infinitely adjustable. Another is colour temperature, given in Kelvin (K), which describes whether the light is warmer, i.e. yellowish, or colder, i.e. bluish. Lights with the ability to change colour temperature allow the lighting to be adapted to the surrounding conditions. The colour rendering index, known as CRI, is also important. This value expresses how faithfully the light can display colours compared to natural sunlight. A high CRI value ensures that the colours in the footage, such as skin tone or product, will be natural and without unwanted colour shift. Currently, the most widely used permanent lights are those with LED technology, which are energy efficient and produce less waste heat than older technologies.

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