From Ben Smith Inc:
This is the Light Power Calculator Lite version that calculates your total power output (in amps or volts) for an array of lights used in the professional world of entertainment on TV, on stage or in clubs. This app does away with the need to have to look up light types, and their power requirements, and then manually add up the total. With this app you have the power to calculate the total light power within the click of a button. What could be more simple?
In addition it comes with a sleek design and is very simple to use.