To select the correct setting, press the SmartSkin sensor (the magnifying glass icon) and put Lumea on your skin. The device will scan your skin and the suggested light intensity will blink white to indicate which intensities you can use based on your skin tone. Press the confirmation button (V) to confirm that you want to use the suggested setting advice to start using the device. Note that you can also set the light intensity setting manually. In that case, please consult the skin tone/hair color table in the user manual. This table shows settings that for the majority of users provides a comfortable, but still effective setting.