Flat-wall photometry, either using a digital camera photometry system or a simple hand-held meter to measure the illumination levels, is the most common type used by stage and studio luminaire manufacturers, but no standards exist to provide guidance for these methods. This project is to define the basic test conditions for these methods so that the data from different manufacturers can be compared on an "apples to apples" basis for measuring methods that use some version of a flat wall. The project does not include defining the actual test methods, which are covered or will be covered by other documents, but confines itself to specifying the basic requirements for the lamps, luminaires, test equipment, and test environment.
BSR E1.25-200x is a project of the Photometrics Working Group, part of ESTA's Technical Standards Program. All parties interested in working on this project are invited to participate by either joining the Photometric Working Group or by commenting on the draft document when it is made available for public review. Membership in ESTA is not a requirement for participation.
There is no charge for joining the Photometrics Working Group, but voting members must attend meetings, which are held four times a year in various locations in the United States. Membership is requested by submitting a working group membership application.
(Lee Baldock)
