Answer 16 questions about using led lights

LED technology in general and LED lighting in particular has gradually established its position in human life. However, with most consumers abandoning the habit of using traditional lights to switch completely to new products such as power-saving LEDs still have many concerns. The following article from TheHomeLightings summarizes more than 16 short and practical questions about LEDs for consumers to understand more about this product.

1. I want to know how the LED works?

The LED consists of 3 main components: led chip; led driver (AC to DC converter) and radiator. LEDs draw DC power from the driver’s leds and generate light. The heatsink is responsible for cooling and cooling the lamp when the lamp is on. Although LEDs produce significantly less heat than all bulbs we’ve used in more than a century, the heat that radiates must be treated, The more efficient the lamp, the longer the life of the lamp. LEDs also succeed in converting 90% of electricity into efficient lighting compared to other light sources, which is why we can replace the 65W incandescent bulb with an LED bulb with just 12W. .

16 Frequently Asked Questions When Starting To Use Leds

2. When I buy LED, should I rely on watt or lumen index?

Based on the new LUME being accurate , watts are an indicator used to determine how much energy is needed to produce lumens. More importantly, pay attention to the lumens per watt (lm / W). The higher this number, the less energy you will need to produce light. You will notice that some lamps lose less energy to produce the same amount of light, and this is something you should consider. Typically, the higher the ratio, the better.

3. Are power saving lights true?

LEDs save more energy than all fluorescent lamps, incandescent lamps, halogen lamps, sodium lamps … The energy consumption will decrease from 40% -80% depending on the type of LED. The life span of LEDs lasts up to 200,000 hours and thus users can save up to maintenance costs.

4. How much money can I save when switching to a led?

This also depends on the number of lights that you replace. However, according to calculations by EVN Vietnam, if your house has 10 traditional 60W bulbs, you now replace them with 10 8W bulbs, the average electricity price is 0.08 $ / kWh, your family will save 13$ / month.

 How much money can I save when switching to a led?
Save Money! Make The Switch To Led

5. What are the benefits of replacing a regular bulb with a led?

There are many benefits to replacing traditional bulbs with modern LEDs:

Reduce your family’s monthly electricity bills

+ Lights do not radiate much heat like other lamps, power is converted almost completely into the light.

+ Lights without maintenance, they can operate in the most extreme conditions.

+ Lamps do not contain mercury as well as other toxic substances in the production.

LED bulbs last from 30,000 to 200,000 hours.

+ LEDs are highly recyclable, safe and friendly to human health as well as the surrounding environment.

6. Can leds combine with dimmer control dimmer?

Dimmer is a removable unit installed in conjunction with electrical appliances to adjust their operation to suit their needs. Leds are ideally matched with dimmers so they are highly rated. However, lamp manufacturers also advise users to choose the right type of dimmer for your home, as using dimmers that are not compatible with the lamp will cause the bulb to fail.

7. Leds contain toxic metals such as mercury in the raw materials?

No, the LED bulb does not contain mercury or any hazardous metals or chemicals in the composition. While CFL fluorescents and fluorescent lamps contain a small amount of mercury, they need to be handled properly. So, when the LED lights out, you do not have to worry about handling the lights so that they are not harmful to human health and the environment.

Leds contain toxic metals such as mercury in the raw materials?
the LED bulb does not contain mercury

8. What color temperature does the bulb have?

The color temperature for the bulb is measured in Kelvin scale. LEDs come in a variety of colors, but the most common are between 2700K and 7500K. Many manufacturers prefer to use terms such as Neutral White, Natural White, Warm White … but there is no standard Kelvin temperature that coincides with these terms. The general rule when considering the color temperature of the LED is: warm color – WARM (2700K), cold color – COOL (6500K +). The warmer the light, the more yellow, the cooler the light, the more green the tone. Depending on the space used, there are different color temperature standards, different kitchen with living room, other company office with family bedroom … Consumers should have detailed references on this indicator on Leds to get the light as desired. Ensuring aesthetics just good for human visualization.

Here is a typical color temperature range for Sunky LEDs :

2700-3200 – WW – White Warm

4000-4500 – NW – Natural white

5000-5500 – DW – Daylight White

6500-7500 – CW – Neutral White

9. What is the size of the led bulb?

Many families want to replace traditional lamps with LEDs, but fear the size of the bulb does not match the location of the old lamp. Currently, most of the leds are of various sizes corresponding to the operating capacity of the lamp, users can peace of mind to choose products suitable for their use.

10. What is the difference between LEDs and CFLs?


Picture LEDs and CFL Lamps

Both of these lamps provide more efficient and economical light output than the lamps they replace. Here are some differences between CFLs and LEDs:

  • CFLs are usually helical in shape. In essence they are small fluorescent bulbs with self-contained ballasts. They contain a small amount of mercury.
  • LEDs do not contain mercury and do not use ballasts or tees in the design
  • You can replace CFL 22W bulbs with 11W LED bulbs
  • The LED will light up when the switch is on. While CFLs take 30 seconds to 1 minute to warm up after turning on.
  • LEDs are not affected by turning them off and on. CFL bulbs, as this will reduce their life.

11. Can LEDs use outdoor lighting?

Of course, the street lighting system, the billboard shop is now the line of modern leds. In addition, public lighting is now part of the led panel to help save energy. Most of the led lights are designed with waterproof fittings, except for some specific lamps for interior lighting, which need to be moisture resistant and prevent negative effects from the environment.

Can LEDs use outdoor lighting
outdoor lighting


12. How long do bulbs last and what kind of warranty is associated with LED bulbs?

Most of our LED products have a 3-year or 5-year warranty. The warranty applies only to the normal use of the bulb and does not cover the misuse or use of the bulb which is recommended as not recommended.

13. What is the L70 number on the led?

L70 is the time required for light to fall to 70% of the original lumen.

  1. Which part of the led lamp is the first problem?

Most of the drivers are leds – power converters for led lights. That is why users should carefully review information about the driver leds when buying leds. A LED product with a 1 or 2 year warranty is a sure sign of how good a driver is in that product. Normally, a controller will last about 50,000 hours.

14. What is the most common reason why LEDs fail more than their actual age?

Heat. Temperature is always the enemy of all kinds of electrical equipment, the higher the temperature, the shorter the light. You need to consider two factors: the heat sink and the operating environment of the leds. A quality radiator will work well and extend the life of the LED . Meanwhile, if the LED lights up in an overheated environment, its light output and life expectancy will be affected.

15. DesignLights Consortium (DLC) on LEDs?

DLC is the DesignLights Consortium, the name of the agency that certifies the quality and effectiveness of LEDs. It’s a similar standard to Energy Star . Energy Star manages quality lighting for residential lighting and DLC for commercial LED products. Currently there are two popular DLC standards in the world: DLC Standard and DLC Premium. DLC Premium is more efficient and will save you more money on operating costs.

16. What is CRI?

CRI is a color rendering index, which is a measure of light quality. In the case of lumens as a measure of the amount of light emitted, CRI is a measure of the quality of the light. LEDs usually have a CRI of about 70-95. Higher CRIs will use more expensive LED chips in their constructions, and therefore high CRI LEDs will cost more.


Led is the abbreviation of the phrase Light Emitting Diode, which is understood to be light emitting diodes (diodes emit light when electricity is applied to it). From the early years of the twentieth century, people invented the technology of led lights . In 1907, British scientist HJ Round invented the first light-emitting diode, followed by Russian scientist Oleg Vladimirovich Losev, who created the first luminaire, but this achievement soon fell into place. forgotten when it is not widely known.

It was not until 1961 that two American scientists, Robert Biard and Gary Pittman, working in Texas, discovered that GaAs emit infrared light when electricity was applied to it. Made out of infrared leds.

In 1962, the first red light led by Nick Holonyak Jr. Then, in 1972, George Craford invented the first yellow light bulb that was 10 times brighter than the light of the red and orange leds.

And it was not until 1994 that the first blue LED light made from InGaN was invented by Nicholas Corporation’s Shuji Nakamura. Then, people took the yellow light mixed with blue light and added a layer of compound called YAG to give birth to white light.Up to 10 years later, Nakamura was awarded the Centenary Technology Award for inventing blue light.

LEDs create new lighting technology

When comparing leds with incandescent bulbs, the filament lamp will find that the leds produce 4 to 15 times more efficiency than the other ones. When compared with fluorescent lamps, leds consume less energy and, in particular, contain no toxic mercury.

Energy saving, LED also has the advantage of long life, the life of the leds 30 times more than the incandescent lamp. On average, a luminaire will have a lifespan of 25,000 hours. If a bulb is activated every 4 hours, it will light up in a 17-year cycle.

Especially since the invention of the blue light of Nakamura was born, the LEDs became more and more popular in our lives. From traffic lights, advertising signs to home lighting led lights … all have the contribution of led lights. The Royal Swedish Academy of Sciences has evaluated the invention of led lights that marked the birth of technology that could change the world.