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Hello everyone, Today we will talk about the relation between power factor and load. As we know that power factor is a very critical parameter when we are designing the lights, and a key value which evaluates the pollution caused by the electrical device to the electricity grid.Normally it has to be over 0.9 according
There are a number of reasons why it is advisable to use LED drivers with high efficiencies. Benefits of high efficiency LED drivers The first, of course, is the cost benefits of high efficiency drivers. The less energy that is required to provide the desired luminous output, the less it costs to power the fixture.
Conventional AC-DC power supplies and DC-DC converters provide an output that is regulated toprovide a “constant-voltage.” However, LEDs work most efficiently and safest with a “constant-current” drive. As a result, many new devices have been developed to provide this type of LED drive. LED power sources that provide a “constant-current” output have typically been referred
The waterproof level of LED drivers is specified by two numbers known as Ingress Protection (IP) ratings, which are a measure of the environmental protection that the driver provides. The first number of the IP rating specifies the driver’s protection against solid materials, whereas the second figure specifies protection from liquids. A description of the
There are numerous types of drivers within the market to choose from for LED light fixtures. However, while LEDs are considered constant current driven devices, why do manufacturers offer both constant voltage and constant-current drivers for LEDs and what is the difference? Constant Current LED Driver vs. Constant Voltage LED Driver First, let us discuss
The IEC 61000-4-5 standard and test-method establishes a common reference for evaluating the immunity of electrical and electronic equipment when subjected to surges such as lightning. Surge test standards for lightning protection as below, IEC61000-4-5 ranks: Level Open-circuit test voltage 1 0.5kV 2 1.0kV 3 2.0kV 4 4.0kV X Special NOTE X can be any
We will talk about the selection of LED drivers. It seems that it is not difficult to select a driver, but it is indeed difficult to find a proper or suitable driver for an optimized light fixture product. Actually there are multi-steps during the selection of drivers and please check those steps listed carefully if
Hello, today we are going to talk about the flicker, or strobe flicker. Difference of flicker and strobe flicker First let’s try to make the difference of flicker and strobe flicker clear. flicker normally indicates the instability of the light system, which can be obviously noticed by human eyes. And the flicker frequency is unstable
DALI is a very popular dimming and control technology in the world, but there are two many concepts and new technologies in recent years, so we write this article to help you understand the DALI dimming technology and help you to be a DALI expert, we believe it will help your work, keep reading. 1
LED lighting systems continue to soar as we can see everywhere. But do you know that there is a driving force as the key component behind the LED fixtures? They are the LED drivers. The LED power supply regulates the LED fixture’s power (voltage or current), thus precisely controlling the light output. In addition, high quality LED
LED lighting penetrates everybody’s life, becoming more intelligent and more sophisticated. When designing high quality and excellent luminaire, the design engineer must carefully understand the LED Driver since it is the heart of a light fixture. This article describes the most frequently used LED driver concepts and provides the methods to select a suitable and
