However, some fluorescent lamps are designed to have a high faithfulness to an ideal light, as measured by its color rendering index (CRI).As well, there is no precise definition of the color of daylight since it varies depending on the location (latitude, dust, pollution) and the time of day.In video systems, white balance can be achieved by digital or electronic manipulation of the signal and hence color-correction filters are not entirely necessary.Without filtering, one must attempt to fix white balance through color timing or by manipulating the film after it has been scanned or telecined.Software applications such as Adobe Photoshop allow the user to correct colors to achieve the desired results in an image.
Chromaticity diagram, Planckian locus, and lines of constant CCT
