Editing Image intensifier (section)

===Sensitivity===
The sensitivity of an image intensifier tube is measured in [[microampere]]s per [[lumen (unit)|lumen]] (μA/lm). It defines how many electrons are produced per quantity of light that falls on the photocathode. This measurement should be made at a specific [[color temperature]], such as "at a colour temperature of 2854&nbsp;K". The [[color temperature]] at which this test is made tends to vary slightly between manufacturers. Additional measurements at specific wavelengths are usually also specified, especially for Gen2 devices, such as at 800&nbsp;[[nanometer|nm]] and 850&nbsp;nm (infrared).

Typically, the higher the value, the more sensitive the tube is to light.