There are many options for buying LED bulbs, but compatible LED dimmers are hard to pick. Many users will be confident that the dimmers of traditional incandescent lamps can be used. The most common ones in the market are thyristor dimmers, which are divided into DC and AC. They are very useful for incandescent lamps.
Choosing the appropriate color temperature, suitable lumen level, and suitable beam angle LED light is the requirement for dimming. Unlike the incandescent mode of ordinary incandescent lamps, dimming LED bulbs with thyristors can be successful, but in most cases many problems can occur.
The most common problem is the buzzing or stroking of the squeak. Ordinary incandescent lamps only need to regulate the voltage to adjust the brightness and darkness, but for LED lights, it may not work. We did the experiment and there are four cases:
1. Can't open at all, it doesn't shine at all!
2. It can only be lit with 100% illumination.
3. It works fine but the buzzing sound is very loud.
4. A strobe will occur when adjusting to a certain brightness.
During the test, sometimes the LED is dimmed to a certain limit and then it can be used normally. The reason we judge that many times are not bright is that the applied voltage of the dimmer is too small to reach the required voltage.
The internal circuit of the LED is much more complicated than the incandescent lamp. The true LED dimmer is not just the voltage adjustment. There are three principles of the LED dimmer:
1. Wave width control dimming: digitize the power square wave and control the duty cycle of the square wave to achieve the purpose of controlling the current.
2. Constant current power regulation: The current can be easily adjusted by analog linear technology.
3. Group control: group multiple LEDs and regulate them with a simple grouper.
The stroboscopic situation is the most common, for the following reasons: The adjustable resistor itself is not a very reliable component, often because of the entry of dust or the manufacturing process is not tight, there will be an instantaneous gap failure when operating the adjustable resistor, then the light source It will flash. Therefore, high-quality adjustable resistors are required, or linear techniques are used to regulate current rather than voltage.
In fact, the internal driving function of the LED itself can easily adjust the brightness and darkness, but most LED manufacturers have removed this function to save costs. Whether the LED lamp can be dimmed or not will usually be marked on the box. If not marked, please use the dimming function with caution or use a dedicated LED dimmer.
To be reminded, dimming is easy to reduce the life of the bulb, why? A simple dimming method: we divide a second into 1000 copies, each one is 1 millisecond, and then let the LED light work for 7 milliseconds to extinguish 3 milliseconds through the control chip, so that it only works in one second. 0.7 seconds, but because the flashing interval is very fast, we can't find out that its brightness is flickering, only its brightness will be darkened, which is 0.7 times of the original, thus achieving the dimming effect. In the same way, we can achieve any brightness such as 50% brightness, 32% brightness. In this way to flash, not bad before you blame!
In order to avoid various problems, the smart light bulb should try not to use the physical dimming method. Pull out the mobile phone and open the APP to adjust the brightness and darkness.
In fact, I still like to use the grouper to adjust the brightness, simple and safe and easy to use, touch button switch or independent grouping switch can be easily done. Perfectly fine-tuning the luminosity from 0 to 100% is not necessary in the home. It can be adjusted several times, and it can be used to meet the needs.
Analysis of 11 defects of LED wicks:Compared to traditional incandescent lamps, LED filament lamps have higher requirements for packaging. It is reported that LED filament lamps have very strict requirements on filament operating voltage design, filament working current design, LED chip area and power, LED chip illumination angle, pin design, and glass bubble sealing technology. The manufacturing process of the filament lamp is very complicated, and it has certain requirements for the capital strength, supporting facilities and technology of the manufacturer.
In the production process, due to different processes, the requirements for materials are also different. In addition, in production, many equipments need to be modified according to the performance characteristics of LED filament lamps, which also makes the related materials manufacturers of LED filament lamps suffer. . The defects on the bulb material also make the LED filament lamp easy to be damaged during transportation. The process is complicated and the yield is low, so that the LED filament lamp can not be praised by manufacturers and consumers.
1 difficult process, poor heat dissipation, easy to breakAlthough LED filament lamps have received much attention in the domestic market in the past two years, at present, the problems in the production of LED filament lamps cannot be ignored: the process is difficult, and several different processes need to be integrated, and the yield is low. LED light lamps over 8W are prone to heat dissipation problems; they are easily broken and are easily damaged during production and use.
2 structure, performance, price to be improvedDue to the relatively late arrival of LED filament lamps in the market, the market-related tipping and tailing bulbs and bulbs are mainly based on “sMDâ€, and the filament lamps that entered the market early are structurally, in terms of performance and price. Far from the expectations of consumers, consumers have some misunderstandings about LED filament lamps. With the breakthrough of key technologies, the maturity of packaging technology, and the improvement of sealing technology, the light efficiency, indexing, life and cost of LED filament lamps will be improved to some extent.
At present, there are too many places for LED filament lamps to be improved. She is like a new born premature baby. It is not mature in all aspects, high in cost, complicated in production process and low in productivity. Therefore, the follow-up should be improved on raw materials and LED lamp beads and in the manufacturing process to increase the production capacity of LED filament lamps, reduce losses and improve shipping efficiency.
3 low power, poor heat dissipation is a hindranceAffected by the production process, LED filament lamps currently have many problems, such as high cost and defects in the material of the bulb, and there is a high damage rate in the transportation process. In addition, the heat dissipation problem of the large wattage LED filament lamp has become an obstacle for the LED filament lamp to enter the homes of ordinary people.
Problem 2: High priceAccording to market research, the average retail price of a 3W LED filament lamp is currently around 28-30 yuan, which is much higher than LED bulbs and other lighting products of the same power, and is higher than LED incandescent lamps of the same power. Many times, many consumers are scared off by the price of LED filament lamps.
At this stage, the market share of LED filament lamps is less than 10%. Nowadays, the LED filament lamp as a special product restores the luminous feeling of the traditional tungsten filament lamp and is loved by many consumers. However, the high cost, low luminous efficiency and small application range of the LED filament lamp are also issues that the lighting manufacturer must face and look at in the next stage.
1 Supporting materials increase product costThe market prospect of LED filament lamps is very bright, but the difficulty in the promotion of LED filament lamps at this stage is mainly due to the high cost and the lack of large wattages. LED filament lamps are currently limited to the application of the lantern market. In addition, raw materials The matching also increases the cost, because the filament lamp does not have a standard in terms of size and shape, and its market volume is not large, resulting in the matching materials are basically customized, and the manufacturing cost is high.
2 LED filament cost is too highAmong all the components of the LED filament lamp, the LED filament is the most expensive, mainly because of its complicated production process, high cutting cost, low production efficiency and low automation, which leads to its cost. At present, 3-6W filament bulbs can be controlled at less than 15 yuan, of which LED filaments account for more than half of the cost.
3 LED filament lamp package is more stressful
The packaging of LED filament lamps is more stressful. The effect of light packaged by each enterprise is not the same. LED filament lamps still have certain limitations in power and heat dissipation, resulting in higher prices than ordinary LED light sources.
At this stage, the power of the best-selling LED filament lamp on the market is basically less than 10W, which means that the current LED filament lamp is technically trapped in the heat dissipation problem and cannot achieve high power, which means that it can only cover A short segment of the entire lighting product line cannot be widely promoted. Even if it is a "nostalgic" brand, the LED filament lamp market is only a niche market, and it will not become mainstream for the time being.
1 Low consumer acceptanceIn the current shrinking market for incandescent and energy-saving lamps, LED lighting products are slowly gaining end consumer acceptance. However, for the moment, the market for LED filament lamps is still very limited. Due to the limited application and power limitation of LED filament lamps, the degree of acceptance of LED filament lamps by end consumers is not very high.
In addition, consumers are not aware of LED filament lamps. Many people think that it is only an improvement on ordinary incandescent lamps.
2 The main demand comes from engineeringSince the LED filament lamp is mainly used for the lantern, its main demand comes from engineering lighting. Therefore, the general dealer will not push the LED filament lamp. Even if there are a few merchants that sell LED filament lights, there will not be too much inventory.
Problem four: promotion is difficultInto the terminal market, we can find that the LED filament lamp is not as hot as expected, for two reasons:
First, many storefronts have not promoted the filament lamp as a key product, and the consumer's awareness and acceptance of the filament lamp is not high;
Second, the LED filament lamp products have no qualitative changes relative to the LED light source products such as bulbs and sharp bubbles. On the contrary, the price is relatively high, which is difficult to measure, let alone replace the market position of LED bulbs, energy-saving lamps and other products.
Therefore, for the moment, the market advantage of LED filament lamps is not very obvious, and the market is basically waiting to see and try.
First, the traditional sealing industry and the LED packaging industry are not well connected (concept and process integration issues);
Second, it is not easy to reverse the concept of the terminal consumer;
Third, the degree of acceptance of LED filament products by the society and the government is not clear. In addition, the price of LED filament lamps is high, consumers have not really clearly distinguished the difference between LED filament lamps and incandescent lamps, which has made the market for LED filament lamps difficult to market.
1 Merchant promotion is not activeAt present, LED filament lamps need to strengthen publicity and innovation in order to achieve good performance in the market. The LED industry has become increasingly fierce, and industry standards have been introduced one after another, which has intensified the market development resistance of LED filament lamps. Especially at this stage, many consumers do not understand LED filament lamps. Merchants are not active enough to promote LED filament lamps, and even most of them. Businesses are not very optimistic about their development prospects. In actual sales, customers usually see or ask, and merchants will push this product.
At present, LED filament lamps are difficult to promote in the market. Because consumers don't know much about LED filament lamps, the chances of purchase are small, and with the impact of e-commerce, the turnover rate of LEDs in physical stores is lower. . Some consumers are more concerned about the price when purchasing products. Therefore, there is still a long way to go before LED filament lamps enter the family of ordinary consumers.
3 LED filament lights lack new selling pointsNow LED filament lamp is in the initial stage of promotion, and there are very few people who know its advantages. Because the appearance of the product is no different from the original traditional incandescent lamp style and appearance, the middle seller has no new selling point to earn high profits, so he is willing to promote The enthusiasm and motivation are not high.
In addition, because some small manufacturers in the early stage occupied a favorable position in the competition for their price, they cut corners on the selection of raw materials, which led to some unstable products, which is also an important reason why some dealers are unwilling to promote.
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