In "8 tricks, teach you how to choose LED lamps correctly!" 》In this article, the author introduces 8 methods to correctly select LED lamps. For example, how to choose reliable LED lamps from the perspectives of wire, light efficiency, heat dissipation, and workmanship.
So, recently someone asked the author: the same LED lamps, why some sell dozens of them, and some have thousands of them? What is the difference between them?
Below, the author summarizes the following main reasons for the huge difference in LED lamps through my own experience and data collection.
Reason 1: Brand grade
For example, two LED lamps that look exactly the same may differ in their final prices just because of the different brands. Why, because the production process of big-brand products is stricter, and besides the problem, your after-sales service is more secure. Of course, the cost of high quality and good service must be counted on consumers.
Although small factories can do the same, they are relatively prone to problems due to insufficient personnel support and poor control of the production process, and if problems occur, the probability of getting fast and effective after-sales service is relatively low.
Reason 2: Differences in supply channels
Or take two LED lamps with exactly the same appearance. Some brands (not specifically named) can make two lamps with the same appearance but with certain differences in the internal core (in fact, this phenomenon is common in many industries. Widespread), where can you tell if you are unprofessional?
In addition, it is easier to understand that since e-commerce channels can be shipped directly from manufacturers, the profits of the middle-level distribution agency are eliminated, and the price will be relatively lower.
However, please remember that as long as it is the same product of the same brand, if the price of one of them is too low, such as the official purchase of 500 and the other purchase of 100, I believe that no matter how promotional and profitable, there will be no such low price for genuine products. of.
Reason 3: performance difference. There are many things involved in this, so we will interpret them one by one.
1. Brightness, light effect
In layman's terms, the LED lamps with the same W number, who is brighter! Generally, regular brand LED bulbs are clearly marked on the manual or the outer packaging box, expressed in lumens (lm), the higher the lumens, the brighter the lamp, and the more expensive the price.
2. Antistatic ability
Usually, only LEDs with antistatic voltage greater than 700V can be used for LED lighting. For inferior "three-no products", they are estimated to have no antistatic ability at all.
3. Wavelength
The production of LED lamps is suitable for the use of an LED spectrophotometer, so as to ensure that the wavelength of the light of the lamps is the same, and finally to ensure that the light output is uniform and beautiful. And for the worse LED lamps, this step may be omitted in the production process, and the effect can be imagined.
4. Leakage current
Leakage refers to the fact that the LED is a unidirectional conductive luminous body, and when there is a reverse current, it is called leakage in the industry. LEDs with large leakage currents have a short life and are naturally low in price. One can be used for three years and the other can be used for ten years. Which one do you think is more expensive?
5. Luminous angle
Our ordinary home users may not encounter this point, but for engineering lamps, this issue is often considered. LEDs with different purposes have different light-emitting angles. Special lighting angle, higher price. Such as full diffusion angle, full light distribution, 360° luminescence, etc., the price is higher.
6. Life
This is not explained, the length of the service life is proportional to the price.
7. The brand and power of the LED chip
The chip is the core of the LED lamp, which is equivalent to the CPU of a computer. Depending on the brand of the chip, the price difference can sometimes be very large. Generally speaking, chips from Japan and the United States are more expensive, while the prices of LED chips from Taiwanese and Chinese manufacturers are slightly lower.
Generally speaking, the quality of a single-chip high-power chip LED is better than that of a small chip, and the price is proportional to the power of the chip. But the integrated type is not the same. The integrated type is composed of multiple 1W or less than 1W chips, which is not as stable as a single chip and has a long life.
PS: If the lamp that you are going to buy does not indicate the brightness, light effect, light-emitting angle, color temperature and other parameters mentioned above on the outer packaging or manual, then decisively change a store and a brand.
Of course, it does not mean that you have to buy expensive ones, but just suitable and sufficient. The specific power is enough, you can read this article, the facade has a detailed and easy-to-understand algorithm.
