LED component factory test mode:
In order to keep the LED element operating at a temperature of Ta(ambinility temperature)=Tj(Junction Temperature)=25°C, the LED element is heat-sinkless without a heat sink and is pulsed for life test. Therefore, it is generally seen in the specification. The temperature of the performance data is Tj=25°C.
LED lighting factory test methods:
The LED high bay lamps are finished products, and the life test is performed using a constant voltage/constant current method. However, the LED lamps include a power supply/shade/heat sink, and the LED high bay is composed of a plurality of LED elements, so the actual The operating temperature of the LED element is higher than the experimental ambient temperature Ta=25° C. (Tj>Ta).
The lifetime of an LED is inversely proportional to its use temperature. Therefore, if a LED lamp factory directly uses the lifetime value of the LED element as a specification, the difference between the specification and the actual use of the LED lamp factory will occur.
In view of this, the Energy Star (ENERGY STAR) issued by the United States Department of Energy (DOE) proposed an LED solid-state lighting luminaire verification method, and its content stated that it would obtain its LED solid-state lighting luminaires. The certification must be accompanied by five items:
1. Photometric test report produced according to IESNA LM-79 experimental method
2. Integrate ball output test report according to IESNA LM-79 experimental method
3, lumen maintenance rate:
Option One: LED Component Performance
. LED component test report produced according to IESNA LM-80 experimental method
. Provide ISTMT (LED component in situ temperature test) report of LED lamps
Option 2 : LED Lamp Performance
. 6,000 hours test report produced according to the IESNA LM-79 experimental method.
4, power supply
Provides TMPPS (original power supply temperature test) reports for LED lamps.
5, warranty
In the option 1 of the lumen maintenance rate, two data experiments are required. The purpose is to calculate the lifetime of the LED lamp using the LM-80 temperature experiment report of the LED component, so that the temperature of the component and the lamp can be solved. Life problem.
