As explained in Fig. 1, Zhaga includes the mechnical, thermal, electrical and photometric (optical) interfaces of a module, but does not include internal workings, allowing manufacturers to differentiate their products. Likewise, driver connectivity will be defined, but internal circuitry will not.
“Expect the first Zhaga standard in the first half of 2011,” said Davies, “and expect more than one standard by the end of 2011.” Several standards will meet different market needs, but unnecessary duplication will be avoided. “There is room for standards with different features – let the market decide,” he said.
A key driving factor for module adoption is the need to design reliable luminaires, which requires an understanding of the LED packaging performance under application conditions. “Buying an LED module from a trusted brand can remove much of the risk,” said Davies.
Also, said Davies, using modules that can be upgraded or replaced when necessary adds value throughout the supply chain, he said. For example, luminaires can take advantage of the most current technology, while distributors can hold a smaller number of parts, since each module can serve a wide range of luminaire brands.
“2010 is the year of the LED module,” concluded Davies, “but 2011 will be the year of the standardized LED module.”