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USA Environmental Protection Agency(EPA) and Department of Energy(DOE) successively released Energy Star and Lighting Facts Standards for LED Luminaires/Bulb from 2010, which makes relevant industry persons have LED Lighting products standard to follow. At present, international LED large manufacturers for LED product Life evaluation and product specification are also on this basis. That is to […]
LISN is short for Line Impedance Stabilization Network. LISN is important assistant equipment for EMC test in the power system. It can isolate the disturbance from power grid, provide stability test impedance and pay the role of filtering wave. LISN net is based on filter theory. When spectrum interference is different from the useful signal […]
People usually confuse the total luminaries luminous efficiency and lamp beads luminous efficiency. We can roughly think the relationship between them: Total luminaries luminous efficiency=lamp beads luminous efficiency in the application environment-driver conversion efficiency –structure optical conversion efficiency. In this relationship formula, we can see that total luminaries luminous efficiency should be less than lamp […]
For lamp beads, there are two concepts of efficiency: Lamp beads luminous efficiency, how much light can be issued every 1W input power. This efficiency is the indicator to measure the light efficiency of lamp beads, not the indicator to measure the light efficiency of total luminaries. Therefore, the light efficiency of single LED is […]
Compare LED efficiency and life, the conception of efficiency is more complex. Firstly, there are three kinds of general efficiency, please check the below: Lamp beads: Luminous Efficiency(lm/W): Connect lamp beads to DC power source directly, the rate of lamp beads flux and consumption power; Luminous Efficiency= lamp beads flux/ consumption power. Conversion Efficiency: Connect lamp beads to […]
LED manufacturers must learn some basic luminaries’ parameters such as brightness, spectrum and color temperature and so on as standard to identify pros and cons. We will introduce following LED lighting products normal parameters and tell you how to design and improve LED lighting products. 1. Brightness/Luminance Brightness/luminance L: Luminance is the luminous flux per Unit […]