Trying to describe your lighting setup without any visual aid is such a pain and attempting to create one takes a lot time. Fortunately Sylights is here to make your life a lot easier.
Splash screen and main menu
Sylights is a drag and drop lighting diagram that lets you create lighting diagrams in just a few taps. It is compatible with iPhone, iPod touch, and iPad that are equipped with iOS 4.0 or later. You can save the diagrams in your library/camera roll and even edit them if you have forgotten something in your diagram. The app includes more than 40 photography equipments to create your lighting diagram with. And did I mention this app is free.
The app has many photography equipments to use for your diagram
If you want to share or just note your planned lighting setup. Sylights is the app for you!
Left: Adding description
Right: A sample diagram
Download the app by clicking the link below.