According to the Garmin manual, when the Light mode is set to Auto: "Automatically adjusts the light intensity and light mode based on the ambient light and time of day."
Has anyone actually tested how this Auto light mode feature works? Does it actually adjust the light intensity based on ambient light? I am assuming the detection of ambient light relies on a Garmin bike computer that actually has an ambient light sensor.
Does the RTL-510 switch from day flash mode to night flash mode automatically? Is this switch based on the time of day?