Zhaga is an industry-wide cooperation between companies aimed at enabling the interchangeability of LED light sources made by different manufacturers. Interchangeability is achieved by defining interfaces for a variety of application-specific light engines. Zhaga specifications cover the physical dimensions, as well as the photometric, electrical and thermal behavior of LED light engines. Zhaga was established to benefit consumers and professional buyers of light engines and luminaires in the expectation that interchangeability will prevent market fragmentation into incompatible products.