Edge:

There are two brake warning lights.

One says "BRAKE" in red and indicates something seriously wrong, like low fluid or some other failure. It also comes on when you set the parking brake.

The other one is yellow and looks like a (O) and that is the front brake pad wear indicator. It is less serious but deserves some attention. If it is flickering now, as the pads wear further it should come on steadily when you brake. Then its time for new pads.

Ken300D