Quote Originally Posted by Walter View Post
It's a shame Android smartphones have stopped using notification lights ...
Not all of them.

Anyway, it eventually becomes redundant if your phone has an always-on display. The notif icons are already there and all they have to do is animate or flash it to get your attention. In which case, a dedicated notification LED becomes less essential.

Notification icons also show the actual icon or icons of apps which received a new unread message (FB, SMS, Viber, Quora, etc.).