This page should give you an overview of the commonly used runtypes for the AHCAL (this is not (yet) a complete list of all runtypes).
This run is used to collect noise data of the detector in calibration mode. It triggers randomly with a rate of approximately 100-120 Hz for the full detector. For analysis tips look here.
s.o., just for physics mode
This run is used to inject light of given intensity into the tiles of the detector. The light intensity can only be steered on module level (not individual LEDs). This is done via the "-v <lightIntensity(int between 0-255)>" option.