You are downloading the FastLight XAP file v22.214.171.124 for Windows Phone. FastLight is a free and useful Productivity app: Fastest flashlight (torch) in the store. It features a dark background which doesn't annoy your eyes while you are trying to see in the ... You can now download the offline XAP file to install & try it.
Download Locations for FastLight 126.96.36.199 XAP file
Note: To install it manually from an SD card, you should choose one of the server location above to get the offline FastLight XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.