When you save your work,
LightZone saves your photo as a "LightZone JPEG" file.
A "LightZone JPEG" file
is an ordinary JPEG file
that is a preview version of your original photo
but also contains the tool stack
you created while editing your photo.
By default, LightZone appends _lzn
to the file name to indicate that it's a LightZone JPEG.
Being an ordinary JPEG file, it can be opened by any application that works with JPEG files, be e-mailed, or displayed on the web. When reopened with LightZone, however, the tool stack is restored and you can resume editing where you left off. Thumbnails in the Photo Browser indicate LightZone JPEG files with "JPEG-LZN" as shown above.
A LightZone JPEG still refers to your original photo (whether it's a raw, TIFF, or another JPEG). Therefore, you should never delete your original photo.
Note: Alternatively, you can save your work as "LightZone TIFF" files by changing the save preference.