Question on minimum time allowed to change states ON/OFF on LS and HS outputs.

Good morning or evening, i have a question regarding the LS and also the HS outputs.

I want to control the blinking of some LEDs using the HS or the LS outputs (MC4X/XC4X), seeing the internal schematics from the instruction book, it seems the outputs are MOSFET outputs, just to be on the safe side, i want to make sure if they can handle switching frequencies (ON/OFF) of 8Hz (every 125ms). According to the help manual from the IqanDesign these outputs are supposed to be used for lamps among other things.

If they can, just for curiosity, what is the maximum frequency of switching they would be able to support, do they depend on the cycle time?. 

Thanks in advance!.