How to judge the Heat sink Performance of a LED lamps

How to judge the Heat sink Performance of a LED lamps?

inspect illumination changes within 30 minutes. (An illumination measurement in 30 minute)

To judge whether heat sink performance of a LED lamp is good or not, the most direct method is to measure the temperature of led chips when the lamp is on whose technical term is “junction temperature”, and obviously it is only a theory.

Maybe someone says advanced technology for heat sink performance analysis through numerical technique is a good method. But for the junction temperature is hidden when the finished lamp was made. That is why we have to collect so many measurements to help judge the heatsink quality of lamps.


As we cannot directly measure the junction temperature, is there an indirect methods which can tell the junction temperature?Fortunately, when LED junction temperature rise, the luminous flux will decline.So, if we can measure the flux of the lamp in the same location, we can know the change of the junction temperature.

The particular instruction is:

  1. Choose a place which without external light interference, had better be in the evening, turn off the other lights.
  2. Measure the illumination lux in a location, write down the reading as the “cold illumination”.
  3. Keep the position of lamps and illuminometer unchanged, lamps keep on working too.
  4. Write down the data of the illuminometer after half an hour, as the “Hot illumination”
  5. If the two numbers are near, in a range about 10 ~ 15%, then the heat sink of lamp is good.
  6. If the two Numbers are far greater than 20%, then the heat sink of this lamp should be improved.
Pic 1. The difference of the junction temperature by the indirect measurement of “An illumination measurement in 30 minute.”

Pic. The difference of the junction temperature by the indirect measurement of “An illumination measurement in 30 minute.”

But what is the reasonable range of an illumination decline? That could only be depends on the performance of the LED chips.

A scope of application in “An illumination measurement in 30 minute.”

We enumerate the “luminous flux vs junction temperature” change curve of several commonly used chip, and from the curve, we can know how many lumen flux decline, and indirectly know junction temperature rose to how many degrees Celsius.

Pic 2. OSRAM S5(3030) chip, Luminous flux decreased by 20% when at 25 °C, junction temperature has more than 120°C

pic. OSRAM S5(3030) chip, Luminous flux decreased by 20% when at 25 °C, junction temperature has more than 120°C

Pic 3. OSRAM S8(5050) chip, Luminous flux decreased by 20% when at 25 °C, junction temperature has more than 120 ℃

Pic. OSRAM S8(5050) chip, Luminous flux decreased by 20% when at 25 °C, junction temperature has more than 120 °C

OSRAM E5(5630) chip, Luminous flux decreased by 20% when at 25 °C, junction temperature has more than 140 °C

Pic 4. OSRAM E5(5630) chip, Luminous flux decreased by 20% when at 25 °C, junction temperature has more than 140 °C

Pic. LuminusSensus Serieschiip, Luminous flux decreased by 15% when at 25 °C, junction temperature has more than 105°C

Pic.5. LuminusSensus Serieschiip, Luminous flux decreased by 15% when at 25 °C, junction temperature has more than 105°C


From the pictures above, it can tel, if the Luminous Flux decrease by 20%, the junction temperature was already over the tolerate range. And the heatsink system is definitely unqualified.

OSLON SSL 80 chip

Pic. 6 OSLON SSL 80 chip

OSLON Square 1-5w chip [PDF], when the junction temperature was raised from 25℃ to 45℃, the illumination flux was raised. And then reached to 120℃, the heatsink performance only declined about 10%. So to this chip, when adopt this measurement way, the change rate should be only 5~8%.

Summary for performance judgement of  the heatsink of led lamps:

  • Thermal conductivity, heat dissipation are very important to LED
  • The key point is junction temperature
  • Suggest to  “An illumination measurement in 30 minute.”
  • The reasonable change scope is based on the temperature curve of the chip
what is G9 bulb

What Is a G9 Bulb?

G9 Light bulbs for home pageWith the passage of time, every aspect of our life has improved, thanks in large to newer technologies. Appliances, gadgets and other devices have made life more convenient and much more efficient. There are devices that have been largely neglected in this rapid progress; one of them is the bulb. They have remained the same throughout the decades, their shapes and functions have remained similar for all these years; this was true, until G9 bulbs were introduced.

G9 Bulbs

You may be wondering ‘what is a G9 bulb?’ the right answer to this question would be, ‘G9s are the bulbs of the future’. When you first look at a G9’s design, you may immediately think that it is something right out of science fiction as it does not look like any kind of light source at all. These halogen creations are completely different than traditional lights, both in looks and in functionality. They do not have the common screw-in base; instead, the G9s have two looped metal prongs for accessing electricity.

There is one similarity that G9s have with classic lights; they are available in different wattage options, just like the bulbs of old. G9s can easily be recognized because of their out-of-the-box shapes and the lack of ‘Edison’ sockets. The prongs of a G9 halogen bulb can only be fixed in a standard halogen fixture. The investment you make in swapping the traditional sockets to halogen sockets will eventually help you cut your electricity bill significantly.

The Advantages

The most prominent benefit of using G9s is that they are highly energy efficient. They utilize a mix of processes that consume very little electricity, but deliver the same amount of light. Another benefit of using G9s is their longevity; a G9 can last much longer than a traditional bulb. They come in varying sizes, so they can be used in any kind of setting. They can be used in lamps and wall sockets in your home, and the larger G9s can be used in industrial settings as well.

Inner Workings

G9 bulbs are commonly made up of a tungsten filament and a halogen based fill gas. The tungsten in them lasts longer because of the presence of halogen gases. G9s are also available in LED alternatives; these are even more energy efficient and cost effective than their halogen counterparts.


The whole process of halogen cycle requires G9s to reach the temperature of 121 centigrade. So, they are very hot and must not be touched after being used. But this risk is mitigated when you buy a LED version of a G9 instead.


The G9 halogen bulbs are most commonly used in consumer appliances, which require smaller lights. They are also ideal for accent lighting and are often used in lamps and desk lights.

Whether you select a halogen G9 or a LED G9, you will be getting an energy efficient, long lasting and affordable alternative to traditional light sources. Now that you know what a G9 bulb is, you may be thinking about switching to it; all you have to do is find the right place to buy G9 bulbs.

The halogen bulbs like led g4 12v are an excellent option for people who are looking to cut down their electricity bills. Before replacing your bulbs, it is highly advisable to consult the right vendors through online forums and sites.

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Why Choose Our G4 12V LED Lamps

There is no denying the fact that more and more customers are shifting towards LED lamps because of the obvious advantages associated with it. They are extremely environment friendly and are also very energy efficient. We are a reputed manufacturer of G4 12V LED lamps. Our lamps are used across many applications and it is common to see them being used on boats and also in homes. Our LED lamp has some unique features and specialties that makes it better when compared to quite a few other brands.

Quality Illumination

There is no denying the fact that our lamps provides quality illumination which gets spread evenly in the cabin. When customers are in the high seas on the boat in the night, the last thing that they would want is not being able to see the controls properly. However, those who have installed our LED lamps have reasons to be happy about the illumination and brightness. Warming up is a problem with many conventional lamps and other types of halogen lamps. This problem can easily be overcome when they decide to go in for our LED lamps. The well defined lighting is there for all to see and one cannot miss the obvious difference in brightness and spread of light.

Your Old Fixtures Will Work Well

Another big reason why more numbers of people go in for our G4 12V LED lamps is because the old fixtures are good enough. Customers need not spend money on new fixtures and fittings. The existing sockets are suitable and no new hardware is required. So certainly is a win-win situation for our valued customers. They also will not be spending on new hardware and fittings and at the same time they will be saving quite a lot of money on energy bills, even when travelling in a boat. The battery life will increase quite significantly and when our LED lamps are used in homes, the energy bills will also get reduced significantly. .

They Are Cooler And Emit Lesser Heat

Another common problem with other lighting systems is that they generate lot of heat. These lights become very uncomfortable during summer seasons. This problem can easily be overcome when one decides to go in for our G4 lights. The lower generation of heat also increases the efficiency of the light and therefore it emits much brighter light when compared to conventional halogen and fluorescent lights.

Hence when all the above points are taken into account, there is no denying the fact that our G4 LED lights are a much better option when one looks at efficiency, durability, brightness or affordability as a total package. So, just call us and we would be able to provide more information about our quality LED lamps.


Why should you use G9 light bulb?

The G9 light bulbs are used in households that are looking for low power consuming lighting solution for their home. They are also used extensively as down light or spotlight bulbs in offices and other commercial places because they are durable and reduce utility bills. These heavy-duty bulbs are exquisite products that are designed to sprinkle a harm-free and bright light. These lambs are manufactured using latest technology so you get technologically advanced products that don’t require frequent replacement.

This lighting solution is considered an ideal replacement for traditional halogen bulbs that emit heat and consume more power. The main advantage of these bulbs is that they are cheaper than the ordinary halogen bulbs. Another feature that differentiates it from ordinary halogen bulbs is that you can adjust the light of the bulb. In areas where low light is required, you can reduce the light emitted by the bulb by making it dimmable. This feature makes this product an ideal choice for most households.

Why should you use G9 light bulbs?

Like any other LED lighting solution, the main benefit of using these bulbs is to reduce lighting cost. Also, if you are looking for durable and heavy duty products that emit low heat, this product is your only option. Most ordinary bulbs are designed for either indoor or outdoor use. However, when you buy G9 light bulbs, you can use them for both indoor and outdoor lighting purpose. The UV rays emitted by some ordinary lambs can harm our body. If you are looking for products with little or no UV emission, you should opt for G9 led bulbs. Also, the risks of fires are reduced as G9 LED bulbs emit low heat.

Why buy from Us?

The range of G9 Light bulbs available here at Enkonn can easily replace your existing halogen bulbs. So, you don’t have to change your fitting to accommodate our product. Just fix our product in the existing fitting and enjoy the comforts of a problem-free product. Our bulbs are manufactured using latest technology which makes them more durable than other products available in the market. Also, our products consume low energy when compared to your ordinary halogen bulbs. This can help you save hundreds of dollars every month.

If you are still uncertain about the product you should buy, contact our customer support team. Our friendly support team is always ready to help you select the right product for your home or office.


E14 Light Bulb: LED vs Halogen vs Incandescent

The extensive selection of light bulbs available today can be quite overwhelming. LED bulbs have gained popularity not
only because of the current technology it holds, but for its high performance and energy saving qualities. It has been even more enhanced by being made affordable, making it a purchase of truly great value, such as what we offer. You surely want to get the most practical in terms of energy efficiency, cost, and of course, what’s best for your family. Enkonn E14 light bulbs are suitable for family use and brings a lot of benefits and convenience within the home. It also works great around the office or business establishments for good, high-quality lighting.

LED vs Halogen vs Incandescent

Halogen bulbs, like LEDs, are also widely recognized, however, the question arises as to how eco friendly it is and how long it holds up to your standards. Most probably, you have halogen lamps at home and notice that it could get pretty hot during use even in just short periods of time. To top it off, halogens could be in need of replacements almost regularly. Hence, it is preferable to have them replaced with E14 15W LED bulbs which are environmentally friendly, energy and cost-efficient at the same time, allowing you to save incredibly up to 90% of electric lighting bills. These types of bulbs produce very little heat which also helps elicit a cooler atmosphere at home yet still have nicely lit areas with a more natural-looking light. It is highly adaptable too, making it suitable for any room in the house for a lovely ambiance in a glowing home interior. It is often used as decorative fittings, chandeliers, and spotlights. Our 30W LED lamps are the best alternatives to incandescent bulbs with a significantly longer lifespan, eliminating frequent replacements while maintaining its brightness for long term use. Both E14 15W and 30W lamps would fit fairly easily onto your existing light fixtures and are guaranteed durable, stable and reliable.

Enkonn ensures your safety with certified 15W E14 LED halogen replacements and 30W E14 light bulbs that are non-hazardous. Switching to our LED bulbs prove to be a wise investment that will serve its purpose well for years to come. Don’t hesitate to reach out to us for inquiries and we’ll be happy to help you sort everything out on lighting concerns, whether at home or at your business. Rest assured that you will be provided with the best products that will meet your needs.


What Makes A G4 LED Bulb The Perfect Replacement For A Halogen Bi-Pin G4 Base Bulb?

12-Volt Halogen Bi-Pin G4 Base bulbs have long been touted as functional lights that offer considerable energy savings. No doubt, the sparking white light that these halogen capsules produce tends to be ideal for landscape and task lighting. However, ultimately they are still halogen bulbs, which means that they operate at a very high temperature producing lots of heat and they still eat up electricity. Fortunately, both these problems can be solved by replacing all halogen G4 lighting with a G4 LED bulb.

What Is A G4 Base LED Bulb?

They happen to be compact sized light-emitting diode lamps that deliver significant energy savings. They are the ideal replacement for halogen lights currently being used in decorative lighting fixtures, such as accent, landscape, pendant and under-cabinet lighting. These low-voltage lights work with electronic transformers and magnetic transformers, while their beam output tends to be omnidirectional as a result of which a consistent, pleasing light is delivered.

Light-emitting diode Bi-Pin G4 Base lamps have some unique characteristics and features that distinguish them from standard LED light sources. Inside standard light-emitting diode lamps, there tend to be two separate pins, which are known as the anode and cathode. Inside G4 Base lighting, there is always a 4 millimeter distance between the anode and the cathode, which is the reason that they are referred to as “G4” lights. The “G” refers to the UV-resistant glass material that these lights are made from and the “4” refers to the 4 millimeter distance. Hence, light rays are exerted by them, which do not cause any harm to the human eyes.

These Bi-Pin G4 Base lighting ideal for numerous different uses, including downlights, decorative functions, landscape lighting and pendant fixtures. While they consume less energy and are small in size, their output tends to be relatively much brighter and higher, which makes them quite suitable for displays and signage. They can also work well in places where concealed lighting needs to be used and under cabinets. They are also perfect for applications where a battery source is providing power for lighting.

The potential applications of these lights are endless, such as:

= Boats & RVs
= Desk lamps
= Display case lighting
= Garden lights
= Puck lights
= Under cabinet lighting

These Bi-Pin G4 Base lamps can be used to replace 10-20W halogen light sources, and in comparison, 80% less energy is consumed by them, i.e. they consume merely 2.5W of power. They also come with a guarantee that they will continue to provide reliable service for years and years to come. After all, they can last for an incredibly long time, up to 50,000 hours. Modern day light-emitting diode Bi-Pin G4 Base lighting is available in a wide variety of input voltages and they are tested with a myriad of different power supply types. Moreover, they also happen to be TUV safety listed.


Along with all of the above, Bi-Pin G4 Base LEDs also happen to be affordable and they also help reduce carbon footprint. Hence, if you have Bi-Pin G4 Base halogens installed at your home or workplace, you should get all of them replaced with an LED G4 bulb.


6 Right Ways to Replace G4 halogen with G4 LED capsule

The G4 lamps are types of the bi-pin or two-pin standard, defined by the international Electro technical Commission (IEC). These types of lamps have two pins at the input. The number 4 in the name indicates the center-to-center distance between two pins, which is 4mm in this type. The alphabet G is used to indicate that the original model of G4 lamp had glass used in it.

Why is it Right to Replace G4 halogen Bulbs with G4 LED capsules?

First, they save a lot of electricity because they operate on much lower power than the halogen bulbs. They are brighter and produce negligible amount of heat as compared to them. Moreover, the average life of a G4 LED capsule is 30000 hours, which is ten times more than the halogen bulb. They have no toxic chemicals like mercury or Barium, thus pose no threat to human health.

Skipping the right practices during the replacement of halogen lights with G4 LED 12v lights result in problems. The common issues are Flickering, proper function or permanent damage to the LED light.  Here are some right ways that should be considered when the replacement is being done.


  • The Right Voltage

A G4 LED capsule is a low power device with a usual operating voltage of 12 volts DC. Some companies also manufacture G4 LEDs that operate on 12 Volts AC. While the mains voltage around the world is 220-240 volts, you cannot directly connect the G4 led with the main voltage.

  • The Right Transformer

You would need a transformer to reduce the mains voltage down to 12 volts. There are two types of transformers available in the market. One is the electromagnetic transformer and the other is electronic. Electronic transformers are preferred due to their efficiency and low cost.

  • The compatibility

While replacing 12v halogen lights with G4 LED 12v, it is important to check the compatibility of the G4 LED lights with the lighting fixtures. As mentioned before, most of the G4 LEDs operate on DC voltage, so they will need a different power supply or transformer to operate.   While all the halogen lights operate on AC, it is very important to check the compatibility of the fixture with the LED light. Both should be Wither AC or DC, but never different.

  • The Right Power

It is important to check the power rating of the fixture where the halogen lights were installed. A 20-Watts halogen bulb would normally be replaced by 2-4 Watts of G4 LED.

  • The Right size

The size of the fixture should always be measured prior to the purchase of LED lights.

  • The Right Model

As mentioned earlier, LED lights are available in both AC and DC voltages. If you want to replace only the lights and not the fixture, you have to bring the G4 LED 12v in AC. However, it is highly recommended that both the fixtures and the lights should be replaced to maximize the long-term benefits of the replacements.


Resource Box

It is always recommended to do a bit of research to know which G4 LED 12v capsule is best for your home.  Online forums and manufacturer’s sites are best sources of reliable information.



G4 LED lights are trending nowadays due to their cost efficiency, reliability and many other benefits. This article highlights the right ways to follow while replacing G4 halogen lights with G4 LED lights.



4 Suggestions For Improving Performance of Heat Radiation for LED Lighting

The lifespan of a LED lighting depends greatly on the amount of heat level, by virtue making of advancement of the heat level is one the vital technologies. However there are complex issues when it comes to solving of problems related to heat generated by the cheap over the heat sink, and that of cooling the entire body. The issues should be addressed in a proper way to increase the performance and efficiency of the LED lighting.

For this case the power of the LED lamp is necessary to consider the heat problem and on the other hand the power LED is needed for cooling purpose. Power LED therefore means an operating current which is greater than 100mA. According to the United States ASSIST Union, there are two types of LED; 2.1V and 3.3V with 210mw and 330mw respectively. By considering the thermal problems of the LED lighting, we are able to increase its lifespan. This therefore calls for a device that is able to spread the heat experienced. In trying to handle this issue of thermal problem, certain parameters have been designed in order to reduce heat resistance and the temperature rise at the junction. This parameters include the thermal parameters and the heat dissipation parameters.

10w g4 halogen replacements-2Thermal resistance is a way of controlling the temperature difference between two state points on an external device in order to produce a steady flow of power across it. As reported by China technologies, the best thermal resistors at the moment for LED power is 10W followed by 5W and lastly 3W in that order. These thermal resistors helps to increase the life reliability.

Junction temperatures is the temperature between the semiconductors found on the LED device. It is normally reflected when the  device is able to withstand the temperature. Improving the heat resistance has created plans targeting the United States SSL. Introducing Chip and Phosphor resistors to the temperature junction will basically increase the reliability of a device. The resistors comes in two i.e. phosphor 150 and phosphor 130. These helps to reduce the requirements needed for heat dissipation.

We have various types of temperature rise. These include the shell-environmental temperature which refers to a device set of temperature (it allows the LED lighting to be measured in terms of hot spot) and the environment temperature difference (it is done on the luminaire level from a distance of 5m from the source of light). This is a direct measurement of temperature difference and the cooling degree between the LED devices. Experimentally, it has been found that if the ambient temperature of the device is 30 and the bulb is 60 then the temperature should remain the same. Raising too high the temperature of the devices will reduce the functionality of the light source therefore reducing it lifespan.

There are two technologies which came into existence due to the development of the LED lighting products. First, the single-tube flux is needed to be increased to a higher current density. This process causes the chip to generate a lot of heat which requires cooling to be done on the LED device. Second, this concerns the structure of the package, when the power of the light source is increasing then it requires more power on the LED chip which is mounted together. The types of structures include the COB structure and the modular lamps. These therefore produce more heat which require more effective devices for cooling and the necessity to handle the new matters which give rise to dissipation of much heat. If not considered very carefully it may greatly affect the performance of the LED lamps hence reducing its life. This therefore means that when a new structure is introduced a perfect set of package should be used together for effective performance to be attained. Considering this precaution will help to increase the functionality of the lamp.

Delivery by airCurrently, in accordance to various types of lamps, research shows that the overall efficiency of lamps is only 50 percent. The reason for the low percentage in efficiency is because of lack of proper devices to reduce the amount of heat produced by the lamps. A lot of power is produced which in turn produce a lot of heat thus lowering the effectiveness of the lamp. These therefore means that more sophisticated technology on led performance should be put in place to handle this issue. Another cause affecting the performance of the lamp is the modular lighting and high current density. These will create points with higher concentration of heat and to avoid this requires proper dissipation of heat.

Consider the following suggestions for heat level improvement

  1. Embrace the new technologies and new structures by use of  chips. At the temperature junction, the LED chips will resist the temperature hence less heat is dissipated.
  2. Consider using the new technology and new package of structures for  devices. This comes with high thermal conductivity, high resistance of heat, phosphor blend, and has new material which comprises of an adhesive between the metal. To meet the above features you have to use a thermal resistance of 10/ W or less.
  3. Use a material with good thermal conductivity to reduce heat up. In this way the ventilation channels should be designed and spread as soon as possible so that the heat required for heat up should not exceed 30. Also consider the use of modular lighting as it helps in reducing the level of heat dissipated.
  4. Use heat pipes to drive away the excess heat dissipated. This means you should put into consideration the cost of designing it.

Furthermore, the design of LED lighting should be made using good thermal conductivity materials with good lighting requirements. This helps the LED lighting to be more efficient, improve the heat level, and have good appearance. Some reports shows that using nanomaterials coated radiator, can improve the thermal performance by 30 percent. In the design of LED lighting, good mechanical properties and tightness should be considered for better results. The required temperature for dust radiator should be relatively small and should be around 30 for  lamps.