Name: Relative Exposure Time In An Illuminance Range
Assigned Number: 0x0062
This property represents a relative exposure time of a light sensor (typically a photodetector) in an illuminance range. The first value (Relative Value) is the relative exposure time (that is, exposure time during the illuminance interval compared with the total exposure time recorded by the sensor - See Total Light Exposure Time). The second and third values (Minimum Value and Maximum Value) define the illuminance range by specifying the minimum and maximum value of the range. This property can, for example, be used to update a column in a histogram that is used by curators in a museum to adjust light levels or reduce the hours of display for a particular piece of art.