LED FAQ'S

What does LED stand for?

LED is short for light-emitting diode.

What Is the life of an LED

LED'S are not  lifelong durable but many of them has a durability of 50,000 Hours. and this is approximately 50 times longer than incandescent lamps, 25 times longer than halogen lights, 8 to 10 times longer than CFL. used 12 hours a day. A 50000 hour lasting bulb will last more than 12 Years. and if it using 8 hours per day will last up to 17 years.

Where we should use LED

It can be used almost everywhere. But remember  the intensity of light available in the room  either it is LED or CFL is directly proportional to the colour of the paint using the particular room and the location of the bulb placed. 

What are the advantages of switching to LED? 

There are a plenty of advantages to switch to LED
1) Durability  

2) Energy Efficient

3) Produce very little heat

4) It do not emit UV or Infra-red

5) Not Contains Mercury 

6)It can operate effectively from cold environment 

Why do LEDs cost more than other types of bulbs? Are they worth it?

LED is still a new technology, and the expense of producing quality product is still high. However, pricing has come down dramatically from just a few years ago and prices are expected to continue to drop. In terms of whether LEDs are worth the extra cost, it's helpful to look at the cost to operate a bulb in addition to the up-front cost. The energy savings realized in a switch to LED means that the extra up-front cost is often paid back rather quickly, and you'll wind up saving money over the life of the bulb. If you'd like to see this in action, Here is an example: for a residential customer who may have the light on for just 10 hours per week ñ the payback is over 10 years. On the other hand, a retail or restaurant client who is burning lights for 90-100 hours per week will calculate their payback on a $70 LED PAR to be less than 18 months. Taking a look at your payback estimate should definitely be a consideration when deciding if LED is right for you. 

Is there really any difference between a low cost  LED and a costly  LED?

Yes. LEDs are very similar to consumer electronics and quality really matters. In order for an LED to function properly and provide an acceptable light output, all of the components must be built to last. It's always a good idea to buy from a manufacturer and retailer that you're confident will stand behind the product. If you'd like to learn more about the components and how cheaply-made LEDs stack up against top-quality product.

Is an LED going to produce enough light to replace my current bulb?

For most applications, yes. Off-the-shelf LED products are now reliably replacing incandescent equivalents of up to 100 watts, and specialty products are available to replace even higher wattages. 

What's the quality of LED light?

If you buy quality product, the light quality is excellent. Color Rendering Index (CRI) is generally used to measure light quality on a scale from 1-100. Most LEDs have a CRI rating of at least 80, and many are rated 90 and above.

How green are LEDs?

LEDs are very green. For starters, they use much less electricity than many other lighting products. This means that less electricity has to be produced to operate them, and resulting in lower emissions from power plants, especially in areas where coal-fired plants are common. Unlike CFLs, they contain no mercury. Because of their long life, they also reduce solid waste: If you replace an incandescent bulb with an LED, you will prevent fifty 1,000 hour incandescent bulbs from being thrown away. Additionally, they produce very little heat and can reduce energy usage related to HVAC. The U.S. Department of Energy has estimated that increased adoption of LEDs over the next 15 years would also reduce electricity demands from lighting by 62 percent, prevent 258 million metric tons of carbon emissions, and eliminate the need for 133 new power plants.

 Should LEDs be used in enclosed fixtures?

Not if they are completely enclosed. In order for an LED to function correctly, they must be in a non-enclosed fixture to allow for heat to dissipate from the heat sink. Otherwise, they can overheat and may fail early.

   

   

What is SMD LED packaging

What is SMD LED packaging



SMD LED stands for surface mount LED, specifically, through this process, chip is mounted onto a small “desk”, then becomes an LED.

LED packaging process takes three steps:
1. Mount the chip onto a desk with adhesive;
2. Connect the chip to system with bond wire;
3. Cover the chip with phosphor to make the color.



Each packaging process is named after the dimension of LED, e.g., 3528 meaning 3.5*2.8mm.






2835, 3014, 3528



2835, 3014 and 3528 are three packaging process based on Epistar and similar dimension chips.




Generally speaking, SMD 2835 design is newer and more advanced than 3014 than 3528. Because 2835 has more effective thermal dissipation system, specifically, a larger heat sink than 3014 on the back, and 3528 has no back heat sink at all, therefore 2835 is able to take higher current and generates more luminous flux.


The form below is the common spec of these LED solutions in these days. The data is based on June, 2013.




The followings can be concluded from the form.
1.Larger chip, the better


Taking 3528 for example, manufacturer could use 10*16, 10*18 or 10*23 chip to make the LED, all can be driven by 20ma, three plans get different luminous flux. Because smaller chip would generate more heat while being driven by same current as the larger chip, it also has shorter longevity and worse quality. However, for most of lamp buyers it is almost impossible to know what brand and dimension of the chip is really being used, the only way is to conclude it from the lamp’s optical performance test.
2.A controversial trick


Higher drive current will make more luminous flux to one chip, and also more heat. 3528, 3014 and 2835 all use 10*23mil chip, but the drive current are different .It is controversial that because 3014 and 2835 have large heat sink, one chip in these packagings could be driven by higher current. However this has become the most popular design.




COB



COB stands for chips on board, which is a different solution than SMD packaging. Generally, an SMD LED is mounts onto a desk, then the desk is mounted onto a PCB, instead, COB skips the middle step and mounts the chips onto PCB directly, and thus, the cost is lower. Saving money is merely one of the advantages of COB.




SMD LED is a point light source solution, Putting many point light source in a lamp would cause certain optical problems, such as, lens flare and Double Vision COB packaging is an integrated area light source solution, it can solve the two problems above. Besides, it has lower thermal resistance due to its structure, and higher CRI could be reached by simply adding red chip to the light source.

Check out our COB LED high bay light and motion sensor LED floodlight.


Nevertheless, COB process still has obstacles in its luminance efficacy limit, but it is the tendency of LED light source solution.


Thanks for reading this article, and you are welcome to take a look at our LED lights.