Screen too dark, screen too bright? Brighteriffic lets you toggle the global screen brightness using a Home shortcut. It is designed to do just that and be super simple. If you want more advanced settings with time-based profiles, checkout Timeriffic on Market. Note: users must deactivate auto-brightness in settings.
RDRR Labs is the official developer of Brighteriffic that can be found in the Tools category. This application has been downloaded and installed by over 50K users and its latest update was released on Jul 10, 2010. The average score for the app is 4.1 on Google Play.
A free .apk installation package of Brighteriffic 1.0.3 can be downloaded from Droid Informer and you can read users' reviews on this site. Prepare 41 KB of free space on your device for this app installer and take into account that it runs on Android 1.5 and above. The antivirus report has confirmed that the app is completely safe for usage.