Photos taken in the artificial light of regular bulbs often come out yellow. This is because light does not always have the same “temperature” (or colour). The white of artificial light varies a lot from the yellow of regular bulbs to the blue of neon or fluorescent tubes. White balance can be regulated prior to shooting by using the camera’s presets or by setting the exact temperature in Kelvin degrees. You also have the option of setting the white balance to automatic (the AWB function) and adjusting it later in post-production.