In failure engineering this is called the "bathtub curve." Those early failures are called "infant mortality" and are typically due to errors in the factory. In

In failure engineering this is called the "bathtub curve." Those early failures are called "infant mortality" and are typically due to errors in the factory. In 20-30 years you'll get wear out failures, as the components hit the end of thier designed lifespans. Generally in manufacturing any new product/process has a pretty high infant mortality rate which then gets worked out over years of improvements to design and manufacturing process. You can either do factory testing (probably what high quality LED brands are doing) or just ship the product and let the customer handle it.