I know a lot of us use applications like BeBuzz to notify us of specific app notifications with fancy colors and toasts. Others prefer to stick with the basic blinking red light. If none of these options suit your taste, the folks over at PingDev Ltd have a solution. Light Up will turn on your backlight of your home screen with each new notification.
The following applications are currently compatible with Light Up:
Light Up allows you to select an active/inactive option for those times when you may not want anyone just passing by to see what's on your screen when that new message comes in. You can also customize which notification types light up your screen, duration and level of brightness. Light Up is available via BlackBerry App World for $1.99 on most devices running OS 4.6.1 or higher.