In some cases, packaging process impact more influence on LED lights chips than themselves. Before designing lamps, engineers should request LED standards or specifications from their suppliers, and conduct light intensity test to ensure that package did not distort the original parameters too much. Good LED chip suppliers can guarantee that the reliability of their LED package will maintain at least three years. Some of them even provide customized high quality LED chips according to the specific requirements.
Testing before production is rather important. There are an example in transportation area can help explaining how tests can prevent LEDs failure in high-degree visibility applications. In 1990s, LED products were used as stoplights on cars and trucks. The performance differences due to the inconsistence of LED chips caused serious damages for these lights and even traffic accidents. Not until recently, when LED lighting technique started to use as traffic lights, this issue received enough attention. Pressure test and accelerated life cycle test are two new modules that typically designed to solve this problem. Those high quality LED chips which has passed these two tests can really safe to used in more harsh conditions.
Not every application required high quality LED chips with advanced and precise packaging. If packaging cannot meet the stringent demands, serious accidents are still avoidable. If the cost of maintenance is reasonable and a few defects are also acceptable, producers will intend to use worse LED packaging.
The most essential point is whether these high quality LED chips can be affordable. If producers never consider of the cost, they can obtain a perfect LED chip with highest quality and best packaging but also a ridiculously high cost. Therefore, within the constraint of cost, packaging level, assembling design and testing should be taken into account. There must be some trade-off. If price were not a consideration, LED lighting manufacturers need to spend a lot time on choosing the best LED chips and co-operate with those LED street light suppliers whose can provide a complete set of reliability and accelerated life cycle tests. In most cases, this kind of co-operation will be long termed. The large potential profit let many medium and small businesses scramble for.