Even though Knoll Light Factory for Photoshop has been discontinued, you can still buy its last updated version from 2015 by buying Knoll Light Factory here, and using the installation instructions here.
If you decide to buy this discontinued product, be sure to understand that:
- It will no longer be updated to work with later versions of Photoshop
- It will not be updated to work with updated versions of OS X or Windows
- Bugs encountered will not be fixed
Related FAQs & Links: