Lighting

I am pretty new to Garmin. I recently purchased a 530 Edge.

Loving it, have managed to solve most of my problems via the instruction manual, i.e. Sharp Turns, Navigation coming up on the data screen.

The problem I have is with Lighting. I have both the Bontrager Ion Pro and Flare. The Garmin detects these and forms a network.

My question is:

Where do I find details on the lighting. I can't find any heading in the instructions. I did read somewhere that it comes on automatically with movement and will dim when you slow down or stop.

Well, mine were detected and on auto and I was riding up my street in the dark. They just would not turn on.

Can someone please direct me to the right info....