Brightness is important in everything from phones and computer displays to TV screens and video boards. Bring your laptop or phone outdoors and you will realize that the display is nothing but shadows ...

Your MacBook does not know better than you. Apple's macOS has an infuriating habit of automatically changing the computer's screen brightness level, seemingly at random. No, it's not all in your head.

Bright LCD displays under low-light conditions can strain the eyes. Likewise, if your office is well-lit, your Dell laptop's dim screen may be harder to see. Ideally, your screen's brightness should ...

Blue light has gotten a bad rap, getting blamed for loss of sleep and eye damage. Personal electronic devices emit more blue light than any other color. Blue light has a short wavelength, which means ...