"Default brightness" refers to the standard or normal level of brightness that a device or display is set to when you begin using or turn it on. Full definition
The battery life is listed at eight weeks with the built - in light on at default brightness, which is another improvement. (theregister.co.uk)
The default brightness is the setting that is made to make the TV or computer look good and bright in stores (with all that florescent overhead lighting!). (theeverygirl.com)
Playing The Legend of Zelda: Breath of the Wild in handheld mode with the default brightness and volume and wi - fi enable, our Switch lasted for 3 hours and 6 minutes before entering sleep mode. (stevivor.com)