After years in the LED street light export business, customers often ask about aging testing during inspections. When the specification sheet or factory report states "whole-lamp aging 72 hours" or "168 hours," many people immediately follow up: how long does it actually need to run to be truly considered passed? Is 72 hours enough, or must it be 168 hours? Today, based on actual factory practice and the requirements of different projects, I will explain this clearly.
The Real Purpose of Aging Testing
Whole-lamp aging testing, also called burn-in testing, involves continuously powering the fully assembled luminaire at rated voltage for a period of time to observe whether problems such as dead lights, flickering, abnormal power, or driver failure occur. Its core purpose is not to verify long-term lifetime, but to weed out early-failure products-what the electronics industry calls the "infant mortality" stage of defects.
Most early failures in LED street lights are concentrated in the driver, solder joints, capacitors, and connectors. By running a certain period of powered aging, these issues can be exposed before the products leave the factory, preventing problems from appearing only after the goods reach the customer's site. This is a completely different concept from the long-term LM-80 aging test performed on LED chips.
What 72 Hours and 168 Hours Respectively Represent
The most common whole-lamp aging duration in the industry today is 72 hours. Many reputable export factories treat 72 hours as the standard process: luminaires are continuously lit on aging racks for three days, during which current, voltage, and temperature are monitored, and visual and functional checks are performed. Seventy-two hours is already effective at screening out the great majority of early defects, offers good cost performance, and is currently the mainstream "pass" standard.
One hundred sixty-eight hours is a stricter requirement, equivalent to continuous aging for one full week. Some projects with very high reliability demands, government tenders, or orders destined for markets where failure costs are high explicitly require 168-hour aging. The longer time further reduces the probability of early failures, but it occupies more aging positions, increases electricity costs and lead time, and therefore raises overall cost.
From our actual shipping data, batches that have undergone strict 72-hour aging already show very low rates of early-failure complaints after arrival. Products aged for 168 hours perform slightly more stably in extreme environments, but the difference is not a qualitative leap. Whether the extra time is worthwhile depends on the project's balance between reliability and cost.
Key Factors That Affect Aging Effectiveness
A common long-tail question from customers is "How should the aging test standard for LED street lights actually be defined?" Duration is only one indicator; test conditions are equally important. Aging must be performed at rated voltage, preferably in an environment close to actual operating temperature, rather than simply lighting the lamps in a low-temperature laboratory. Some factories, in order to meet deadlines, run aging at reduced voltage or for insufficient time; on the surface, the lamps pass, but the actual screening effect is greatly diminished.
In addition, monitoring during the aging process is critical. Simply switching the lights on and leaving them there without checking current and status midway is little more than a formality. The proper approach is to record data at regular intervals and immediately remove any abnormal units for analysis. We require factories to conduct at least two complete inspections during aging and to keep records so that customers can trace them if needed.
Actual Choices for Different Markets and Projects
For shipments to Europe, North America, Japan, Korea and other markets that demand high reliability but have stable grids, 72-hour aging combined with solid design is usually sufficient. For destinations in Southeast Asia, Africa, the Middle East and other regions with high temperature, high humidity and large grid fluctuations, if the customer's budget allows, 168-hour aging is recommended, or at least a high-temperature aging stage should be added on top of the 72-hour baseline.
Some large municipal tender documents directly stipulate "whole-lamp aging of not less than 168 hours"; in those cases the requirement must be followed. If the contract contains no special provision, 72 hours is currently the industry-recognized reasonable pass line. Blindly pursuing longer times only increases cost and brings limited benefit for most regular projects.
How to Effectively Control Aging Quality When Purchasing
Clearly state the aging duration and conditions in the contract or inspection documents, and require the factory to provide aging records or photographs. During inspection, spot-check luminaires on the aging racks to confirm they are running at rated voltage and to review whether any abnormal records exist. For important orders, you can ask the factory to extend the aging time of a portion of the samples for comparison.
Aging testing is the last line of defense before shipment. Longer is not automatically better; the duration must match the design quality and component grade. Truly good products rely on reliable design from the outset, not on prolonged burn-in to compensate for shortcomings.
Conclusion
In whole-lamp aging testing, 72 hours is currently the mainstream and effective pass standard in the industry, capable of screening out early failures effectively. 168 hours is a stricter requirement suitable for projects that demand extremely high reliability or face harsh environments. The choice should be based on the target market and contract requirements rather than simply assuming that longer is always better.
If you are currently purchasing LED street lights, please feel free to contact Luxsky Lighting. All our export products undergo a strict whole-lamp aging process; the standard configuration is 72 hours and can be extended to 168 hours according to customer requirements. The process is traceable, and the data are verifiable. Whether your project needs conventional reliability or a higher standard, send us your specific requirements, and we will provide a matching aging plan and product recommendations to help you minimise the risk of early failures. We look forward to working with you.
