Light Source Pro
By Four Pin Plug
$29.99
Rated 4+ in iTunes
Compatible with iPhone, iPod touch, and iPad.Requires iOS 3.1.3 or later

Designed for Cinematographers, Directors of Photography, Cameramen, Lighting Directors, Stills Photographers, Camera Assistants, Gaffers, Best Boys and Electricians; and as a guide to Producers, Line Producers and Production Managers—Light Source helps take the guesswork out of choosing the correct lamp for the job in hand.

Light Source is a fully functional photometric calculator for industry professionals, for Film, Television, Photographic, Theatre and Stage applications. This application also serves as an essential learning tool for Film Schools and their students.

Light Source contains an extensive database of lighting fixtures from leading manufacturers. Enter your criteria and the search engine will suggest suitable lamps to meet your needs. Alternatively you can start by selecting your favorite lamp to see if it will be suitable for your requirements.

In Movie and DSLR mode the output includes a value for the actual exposure level (F/T stop) provided by the lamp with the given settings.
In all modes (Movie, DSLR and Stage) the output includes the foot-candles and beam spread you can expect.