What do the lights on the Controller mean?

There are 4 lights on the Controller. If the top indicator light is blinking red, the controller is attempting to join the Lightcloud network. It turns solid green when the Controller has joined the network.

The three smaller blue lights nearest the threads turn on when the Controller receives a message from the network. Three blue lights mean you have excellent signal strength, two blue lights mean adequate strength and one blue light means poor signal strength. Poor signal strength should be avoided by changing the location of the Controller or adding an additional Controller nearby used as a Repeater to boost strength.