The Auk has a built in light sensor (ILS) for red, green
and NIR bands of the spectrum. This value controls the
sensitivity of the light measurement. Because the camera may
be moving, high sensitivity is not always good. Values lower
than 64 should only be used for stationary cameras. 16 is the
minimum practical value. In situations where the camera is
subject to significant rolling and pitching modtion, values may
be set higher. The maximum practical value is 1024.