Brightness Icons is a great tweak for jailbroken iOS devices which enables you to adjust the brightness on your device in a very simple way. In older Tweaks you have to navigate your way around the Settings app to dim your display , Brightness Icons simply enables you to do it right from your home screen.
This tweak is available now for free from Cydia. Brightness Icons places two icons on your home screen labeled ‘Up’ and ‘Down’. You can turn your brightness up and down by tapping up and down icon while tapping the Down icons.When you hold each icon it adjusts the brightness to its maximum/minimum level instantly.
Check out Brightness Icons in action :
[via 1, 2]