Light Screen

gives a transparent background to your phone that act as a dimmer so that you can use your phone without hurting your eyes . You can use it as a night mode when using phone in the night during late night conversations or beneficial playing games , it is beyond the traditional brightness adjusting service in android you can set the filter as low as you want and it will protect your precious eyes from the killing rays coming out from your phone screen.

Note****
1.(It may not work in some devices specially running on lollipop or marshmallow , issue will be fixed soon)

2. just shake your phone if you accidentally make your screen black no need to switch of or pulling battery out from your phone

Features:-
Set the desired brightness for your phone just tap the notification in the status bar to change settings
Free for all