Whether you need visible notification lights on your iPhone or just want them, the LED flash makes it possible.
Unlike some other phones, the iPhone doesn't include a dedicated notification light. The iPhone does, however, include an accessibility feature for the deaf and hearing impaired that uses the LED flash to provide a visible cue for incoming notifications. That's in addition the the usual vibrations already provided by the system. Whether you need LED notifications or just want them, once you enable the feature, all you have to do is leave your iPhone screen-down and in sight, and you won't just hear notifications come in — you'll see them!
Yes, BlackBerry and Android switchers, this includes you!