Light Emission Distribution Laboratory

Division of Photometry & Electrical Testing Pty Ltd

Light Emission Distribution Laboratory

Division of Photometry & Electrical Testing Pty Ltd

New CIE photometry standard for LED products.

CIE S025 has been published for photometry of LED products. It will eventually replace IES LM-79 as the primary reference standard as it is technically similar but international rather than regional. It will take a long while for tender documents etc. to be changed to refer to CIE S025 so as LEDLab is NATA accredited for both standards we can report either way. We will generally test to IES LM-79 unless you ask for CIE S025.

Laboratories in the USA have historically used instrument accuracy rather than overall Uncertainty as a method of ensuring quality. So as CIE S025 requires expression of Uncertainty of Measurement for all values, it will take time for the whole world to adopt this.