First of all, you have to install the Arlo app in your device and sign in by filling the correct credentials. Then you need to click on the mode or bridge which is connected to the light for which you need to change the motion sensitivity to the Arlo camera setup. After some time, you should click on the pencil icon and tap on the edit next to the mode. With this, you need to tap on the edit next to the rule that you are willing to edit. Then, click on the edit icon just next to motion is detected.