What are the main specifications for a led light fixture?
Specificatons of a product is very important when we want to learn about it. So what are the main specifications for a led light fixture? This is a frequently asked problem in led light industry. Today we will talk about it.
1, Components of a led light fixture
A led light fixture is made of housing, driver and Led. Specications for the driver and Led make a big difference to the quality of the light fixture. Here we will tell you specifications about them.
2, Specifications for driver
There are many specifications for led driver, but here we just talk about the common ones of them. You wold know how to choose a led driver after reading this article.
a, Input voltage and input current
As we all know, there are different voltages in the world. We divide it to two parts. One is using around 110V, like America and Japan. Another is using around 220V, like China and most of the European countries. So when we design a Led driver, we need to consider where it would be used. So we make different input voltage for the driver. But now more and more drivers are designed wide range of voltage from 85V to 265V to apply to all the situations.
So once you know the concept of input voltage, you would know what means input current. But the reason of different input current is not based on the geographic position. It is based on the current in the wire.
b, Output voltage and output current
High voltage is very dagerous to people. So we need to low down the voltage when it comes out from the Led driver. This is called output voltage. We need to know what the output voltage is so when you connect it to the Led, it won’t burnt. Usually the output is from 12V to 42V.
We also need to pay attention to the output current. Because if the output current is too big, the Led would be burnt.
c, Alternating current frequency
There are two alternating current frequency in the world. 50Hz and 60Hz. The driver are designed to fix all situations. It is a long story why it is 50Hz and 60Hz. So we don’t talk about it here. If you are interested in it, you could learn it from the argument of Edison and Tesla.
d, Power factor
Power factory is used to measure the efficiency of the driver. It is a number below 1. And it is better when it closer to 1.
3, Specifications for Led
There are also many specifications used to measure the quality of the Led. And we here talk about the below 5 specifications. You would know how the specifications influence the quality of the led light fixture.
a, Wattage
We talk about the wattage of one Led here. There are different Leds, such 2835, 3030, 5050 and Cob Led. They all have their own working wattages. You need to choose the suitable one for the led light fixture. Because if your radiator is not enough to support the big wattage Led, the light fixture would degenerate quickly.
b, Luminous efficacy of light cource
Luminous efficacy is the specification to measure the brightness of the led light fixture. To a certain extent, the higher luminous efficacy, the better. But there is also negative effects if luminous efficacy is too high. If you increase the luminous efficacy by increasing the current, this would do harm to the lifespan of the Led. We need to increase it by improving the process or row material, suck as big led chip and good glue.
c, Light intensity attenuation
Light intensity attenuation is a specification to describe the decay of the led light fixture. This influence the lifespan of the light fixture. If light decay too fast, the light fixture wouldn’t work as a light.
d, Correlated color temperature
Correlated color temperature is the most popular specification. Almost every one knows it. The common color temperature is 3000K, 3500K, 4000K, 4500K, 5000K, 5500K and 6000K. Let’s see the difference of the color temperature by the picture below.
e, Color rendering index
Color rendering index is to measure the ability of restore the light. Usually we have CRI more than 80, 85 and 90. The higher CRI, the better ability. Let’s see the difference between different CRI.
