How to do photometry test for outdoor lights according to CIE 121?
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The following procedures are required to complete the photometry test for outdoor lights in accordance with the standard CIE 121 established by the International Commission on Illumination (CIE): Preparation: Collect all the essential tools, such as a photometer, goniometer, and a source of reference light. Make certain that the testing setting is appropriate, with a consistent and well-managed amount of ambient light. Prepare the test sample, which may be anything like an outside light fixture, by making sure that it is correctly placed and in good functioning condition. Calibration: Follow the directions provided by the manufacturer to properly calibrate both the photometer and the goniometer. Check if the measuring equipment is accurate by comparing the results of the measurements you took with the reference light source to the photometric values that are already known about it. Measurement: Position the photometer so that it is a predetermined distance from the s