You are downloading the Lightscales AppX file v220.127.116.11 for Windows Phone. Lightscales is a free and useful Productivity app: Turn your phone into super-fast light sensor for free with no ads! This app measures ambient or spot light with the built-in light sensor. You ... You can now download the offline AppX file to install & try it.
Download Locations for Lightscales 18.104.22.168 AppX file
Note: To install it manually from an SD card, you should choose one of the server location above to get the offline Lightscales AppX file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.