Integrating Sphere | Goniophotometer | Surge Generator | ESD Simulator - LISUN

The Illuminating Engineering Society (IES) developed the LM-80 testing standard as a means of assessing the efficiency of light-emitting diodes (LEDs) and other solid-state lighting devices. When measuring the lumen maintenance of an LED light source over time, the circumstances of the test, the methods to follow, and the criteria for reporting are all specified by the standard. The LM-80 test was developed with the intention of furnishing LED producers as well as end users with data that is dependable and consistent about the LEDs' long-term performance. The results of the tests are often presented as the average lumen maintenance at various intervals, such as 6,000 hours, 12,000 hours, and so on, up to a maximum of 50,000 hours. For example, a 6,000-hour test may report the average lumen maintenance after 12,000 hours. After that, the data from the test is utilized to make a prediction of the LED product's lifespan, which is referred to as L70. This standard is acknowledged

For the aim of determining the angular and spectral distribution of light, one kind of instrument known as a goniometer-spectroradiometer system may be used. It typically consists of a goniometer , which is used to rotate a sample or light source through various angles, and a spectroradiometer, which is used to measure the intensity of the light at various wavelengths. The goniometer is used to measure the angle at which the sample or light source is rotated. The gonio spectrometer is the instrument that is used to determine the degree to which the sample or the light source is spun. It is only when these two components are brought together that it is feasible to ascertain the angular and spectral characteristics of light. This information may subsequently be put to use in a number of scenarios, such as when calculating the reflectance or transmittance of materials or when analyzing the efficacy of optical systems.