I've had my Edge for a few years, but given up on using it because the light modes seem completely unreliable. Firstly with the unit on its own the light modes do not match the modes in the manual. I seem to have two bright modes before I get to the peloton pulsating mode. I don't seem to have a daylight flashing mode in the cycle. Often I find that I select a mode and later find it has changed mode, often to standby, which is why I just don't trust the light.
Now reread the manual twice, tried playing with the settings in my Garmin Edge 1030, but the unit seems as confusing and unreliable as ever. Is there some settings that just ensures it behaves like it does in the manual, when you press the device button?