• At present, LED and LED lamps and lanterns can’t achieve ideal service life due to the reason of the performance of LED. The LED junction temperature in the working status is not only the direct key to its life and efficacy, but is also influenced by the thermal resistance under the same service conditions. The feasibility of the heat conduction system design of LED also directly affects the life of lamps…

  • A lamp is composed of one or more luminous light sources with a shell (namely lamps, for example, some down lamp can be installed in one tube or two tubes). The light source and lamps can be separated. Nominal flux of each light source: it refers to the Nominal luminous flux of each light source installed in the Test lamps. It is expressed as φNominal Test flux of each light…

  • When choosing the instrument to purchase or use for the application, it is very important to understand the types of instruments available for measuring color. A colorimeter or spectrophotometer can be used to measure any test substance that is itself colored or can be reacted to produce a color. Both colorimeter and spectrophotometer provide data obtained over the same range of visible wavelengths, but there are some differences when they deal this data….