In the current LED lighting market, the prices of wall washers, flood lights, point light sources, underwater lights, fountain lights, and underground lights are widely reported by various merchants, and they all say how good their products are. How to judge whether the quality of LED lamps meets the standard when a layman chooses to use them? The quality of LED lamps mainly depends on several parameters:
1. Light decay, better LED lamps have a light decay of less than 30% before 25,000 hours; the main factors that determine light decay are the quality of the light source and the difference in heat dissipation structure; high-power light sources packaged by foreign original factories, such as CREE light sources. The light decay is better than that of the domestic packaged light source. As a layman, the light source is generally invisible. The simple way to judge is mainly the price. The price of the original packaged light source abroad is much higher than that of the domestic packaged light source.
2. Light efficiency, that is, the number of lumens per watt, in LM/W, which reflects the power-saving performance of lamps. The better the power-saving lamps, the higher the light efficiency. At present, the luminous efficiency of LED is almost the same as that of compact fluorescent lamps. With the improvement of LED luminous efficiency, CREE may produce 186lm/w light source this year.
3. Light source, LED lighting fixtures use high-power LED as the light source, and the price is higher.
4. Driving power supply, a good driving power supply can ensure the life of the whole lamp. The theoretical life of LED is 100,000 hours and the life of general driving power is less than 100,000 hours; in order to ensure the life of the whole lamp, the driving power is also a key part; On the one hand, the LED must be driven by constant current. If a low-cost constant voltage drive is used, the service life of the LED will be shortened.
Choice of LED lamps:
First of all, you should clarify your positioning, whether you need high-end or mid-range lamps. Consider the quality of LED lamps from several aspects:
1. Chip type, the most high-end chip used in China is the 3-level chip of American CREE, which reaches 15 yuan/W. Followed by Purui, etc., as well as Japan, South Korea. Some chips in Taiwan. Personal recommendation is Purui chip, the price is higher,
2. Light decay, light decay is closely related to the heat dissipation of the lamp and the packaging of the chip, and the packaging manufacturer should also consider it
3. The lumen value is now claimed to be 130LM/W. I personally think that 80-90LM is the most suitable for indoor lamps, and the technology is also the most mature.
4. Color temperature and treatment of lamp body surface
5. Driver, this should be said to be a short board that affects the life of LED lamps. Most LED drivers can only be guaranteed for 2 years. That is to say, after 2 years, you can cause the lamp not to light because of the broken driver.
