The Photometric Instabase is a tremendous collection of manufacturers’ current photometric data. As manufacturers’ products evolve, they are often retested photometrically and their performance changes. Sometimes in a small way, other times by a large magnitude. We have implemented an auditing feature in the luminaire Define dialog that will search the Instabase for your previously defined IES files (by filename). When a match is found, the audit dialog will allow you to compare those already defined with the newly found Instabase version of the file. You can then elect to keep the existing, or replace with the Instabase file. This is a great way to ensure you are using the most current data!