This Technical Note is Part I in a three-part series examining the proper maintenance and use of integration sphere light measurement systems. This first Note is an overview of basic sphere theory, operation, and equipment. Parts II & III will focus on specific flux measurement procedures and integrating sphere equipment details.

This document was produced by Lighting Global Quality Assurance. In February 2020, Lighting Global Quality Assurance evolved to become VeraSol, an independent program offering quality assurance services for solar energy kits and off-grid appliances.