# LED automations

LED automations are ways to automatically control the 4 available LEDs in the Pioreactor. These LEDs can be used as a light source for photosynthetic microbes, influence the environment of the microbes, as additional sensors, or improve existing sensors.

### Silent​

Requires: None

The silent automation is the simplest automation: doing nothing. The automation will still "wake up" every duration minutes, but does nothing.

### Light/Dark cycle​

Requires: up to 2 LEDs, in channels B and C.

This automation will turn the LEDs in channels B & C ON and OFF on a predetermined scheduale, specified by light_duration_hours and dark_duration_hours. The intensity of the LED is given by light_intensity. The LEDs start ON. duration is set to be 60 minutes.