The LightZone 4.1.7 package just landed in Sparky repository.

From Wikipedia:

LightZone is a free, open source digital photo editor software application. It was originally developed as commercial software by the now-defunct Light Crafts. Its main purpose is to handle the workflow when handling images in various RAW formats. It is comparable to Adobe Systems’s Photoshop Lightroom

sudo apt-get update
sudo apt-get install lightzone

The source package is also available in our src repos.