Hi brunohpcarvalho Thank you for your asking. My ZA550KL on Android 8 WW-15.00.2004.111 has "Night Light". Please check Setting>Display>Night Light If your Night Light option is disappeared, kindly try some stay-at-home troubleshooting tips below: 1. Settings>Apps & notifications>See all apps>3 dots on the top row>Reset app preferences 2. Also, please try "the Factory Reset" Settings>System>Reset options>Erase all data(factory reset) Please note that once the Factory Reset is completed, all data, apps, settings and personal information will be deleted.