• When LEDs arrived on the market, their tremendous efficiency and money saving potential changed the playing field and lumens, lux and candela finally became obsolete metrics for determining light requirements for plants. Recently, people began referring to PAR, PPF and PPFD as ways to measure light in photosynthetics lighting applications. The purpose of this article is to explain what these terms mean, correct some common misunderstandings and help growers understand…

  •   For lighting purpose, the luminaries playing a important role. A good lighting design is achieved by the choice of appropriate luminaries. The nature of the light emitted by the lamp and light control depend on the type of light source, the lamp reflection and the transmitting system and various dimming devices etc. It mainly reflects in the distribution curve of lamps. Light distribution curve is actually shows how a…

  •   During the measurement of luminous flux with integrating sphere, comparing with common lighting source, the luminous flux test accuracy of LED lighting source have given huge challenge to the testing equipments. On the one hand, LED light source have outstanding directively characterizes than other ordinary light sources. Normally it wouldn’t uniformly emit lighting at all the direction on the whole space. This feature makes LED’s direct light distributed unevenly…

  • OLED (Organic Light Emitting Display) is a new generation of flat panel display technology after LCD, LED, CRT and PDP (Plasma Display Panel). It has significant new industry characteristics. OLED is a new type of pure solid (CRT and PDP), which is a new type of pure solid (and LCD) with advantages of LCD and CRT. Besides, OLED has advantages of self luminous (no back light source), simple structure, ultra…

  • IP is the abbreviation of Ingress Protection. IP grade is the protection level for electrical equipment shell against the foreign body intrusion. It comes from the international electrical commission standard IEC 60529 which was also used as the national standard of America in 2004. In this standard, for the protection level of electrical equipment shell against the foreign body intrusion, the IP level format is IPXX. In which the XX…

  • According to IESNA-LM-79-80, the total luminous flux (lumen) of SSL products shall be measured with an integrating sphere system or a goniophotometer. The method may be chosen depending on what other measurement quantities (color, intensity distribution) need to be measured, the size of SSL products, and other requirements.   The integrating sphere system is suited for total luminous flux and color measurement of integrated LED lamps and relatively small-size LED…

  • With the popularity of LED lights, the traditional energy-saving lamps and fluorescent lamps will out of the market. But in these years of the transition period, energy-saving lamps and fluorescent lamps still occupy the mainstream in some areas. Same with LED lights in basic components, the complete energy saving lamps also consist of lamp (light source), electronic ballasts and fixture (shell), the quality of electronic ballast which one of the…

  • LED luminaries consist of LED power driver, single LEDs and fixtures, which the LED power driver is like the heart of human, so it is the key part. Since the LED is sensitive semiconductor device and also has the negative temperature characteristics, it needs to be applied in steady state operation and protection in the application, resulting in a drive concept. LED devices is strict with LED power driver, LED…

  • IEC60529 is a document to set standard for enclosure protection grade, published by International Electrotechnical Commission. Make the standard test equipment to approach to the dangerous parts, we called protection grade test, show as IP code.   IP code is a coding system to indicate the degrees of protection provided by an enclosure against access to hazardous parts, ingress of solid foreign objects, ingress of water and to give additional…

  • IESNA-LM-80 (Measuring Lumen Maintenance of LED Light sources) is an approved method by Lighting Engineering Association of North America (IESNA) for the third generation SSL products; it mentioned the measurement standard and method. The main purpose is that measure and records the LED lumen maintenance change along with time, in other word, it is applied to test LED aging life.   Compare with the traditional light source, theoretically LED life…

  • Electrostatic discharge may occur from personnel to object or object to object, and it will cause the failure of electric and electronic devices. So, the test of electrostatic discharge is widely applied in the worldwide. The ESD Generator (ESD Simulator,ESD Gun) is an important tool for the EMC test and ESD immunity test, the test purpose is to check if the EUT can work under the electrostatic discharge.   There…

  • Spectrum is the relative distribution of wavelength and light intensity. The spectrum of LED is generally monochromatic LED, such as blue LED with a peak wavelength of 470nm, with shorter peak wavelength ultraviolet area and with longer peak wavelength green areas as the determination limitation of light intensity. And the spectrum of incandescent lamp, its luminous intensity is widely distributed in the blue area 400nm to 700nm near infrared field,…