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FFluorescent

The illumination produced from a gas-discharge lamp or tube is called fluorescent light. Electricity to the lamp stimulates the mercury vapor within the lamp creating the emission of electromagnetic radiation which produces the fluorescence. This type of lighting is typically found in office buildings, warehouses and industrial settings. The light produced is “green” or a cooler-than-daylight light balance. Setting a camera’s white balance to Fluorescent will correct for the green cast.

In terms of color temperature, fluorescent light generally falls between 4000 and 5000 degrees Kelvin.

Color Temperature

Light Source

1000-2000 K

      Candlelight

2500-3500 K

      Tungsten Bulb (household variety)

3000-4000 K

      Sunrise/Sunset (clear sky)

4000-5000 K

      Fluorescent Lamps

5000-5500 K

      Electronic Flash

5000-6500 K

      Daylight with Clear Sky (sun overhead)

6500-8000 K

      Moderately Overcast Sky

9000-10000 K

      Shade or Heavily Overcast Sky

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Optical Low-Pass Filter
A filter fitted in front of the image sensor to reduce moiré by filtering ultraviolet and infrared light.
Optical Viewfinder
The window in which the photographer frames the subject and checks focus. Find out more.
Overexposure
The result of the film or image sensor receiving too much light.
Orthochromatic Filter
A green or yellow-green filter used with black-and-white film, it compensates for the difference between the color sensitivity of film and the relative luminous efficiency of the human eye for more natural-looking pictures.
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