How to select LED light beads? How to select LED light beads?

Release Date:

2021-04-26

　　1. Used for support LED light bead Differences between the materials:

 

　　Currently, aluminum, brass, and red copper brackets are available on the market. Aluminum brackets are the most affordable, while red copper brackets are significantly more expensive—often by a factor of more than ten. Even among copper brackets, silver-plated versions vary in price. On the market, “high-quality brackets” are generally understood to refer to brass brackets that have been silver-plated.

 

LED light bead

 

　　2. Differences in LED chip size:

 

　　Chip size design is typically specified in mils. Without a high-magnification measuring microscope, it is generally difficult to distinguish between chips of similar dimensions. Larger chips tend to appear brighter. To compare chip sizes, we can analyze and calculate the chip area—for example, a 23×10 chip has an area of 230 square mils. Using chip area as the criterion for differentiating chip sizes is therefore a reliable approach.

 

　　3. LED light bead Differences in welding wire materials:

 

　　The chip and the lead frame are electrically connected via gold wire bonding. Currently, the market offers two types of bonding wires: alloy wire and pure gold wire. Pure gold wire is superior. Gold wires are classified by diameter—0.7 mm, 0.9 mm, 1.0 mm, 1.2 mm, and so on—and the thicker the wire, the lower the thermal resistance and the longer the service life. Therefore, it is essential to inquire about the material and diameter of the gold wire used.

 

　　4. Differences in the phosphors used in LED chips:

 

　　White-light LED chips are manufactured by combining a blue-light-emitting chip with **phosphor. Phosphor research is mainly divided into aluminate and silicate systems; aluminate phosphors generally outperform conventional silicates in terms of performance. The most prominent aluminate phosphor is YAG, which boasts stable performance and low light depreciation. In contrast, silicate phosphors—and their inherent chemical structure—are relatively less stable, though they offer higher brightness than YAG. If you want to develop a product with consistently stable performance, don’t be misled by claims of “high brightness”; this is a major issue.

 

　　5. LED light bead Differences in adhesives:

 

　　Phosphor is mixed with adhesive and then applied onto the chip. The quality of the adhesive affects light depreciation and color shift: poor-quality adhesives yellow over time, leading to increased light depreciation. High-quality adhesives are typically gel-like.

 

　　6. Color, voltage, and spectral specifications for LED chips:

 

　　Color grading: This refers to the classification of color temperature. For example, 3200K–3350K is considered a specific bin. The official packaging facility will provide color-temperature BIN codes. The finer the color-temperature grading, the better—narrower bins ensure superior color consistency across the light source.

 

　　Voltage partitioning involves dividing the operating voltage range of a chip into discrete steps, such as 3.0 V to 3.15 V. For different light sources, this approach employs series–parallel connection management, with voltage step control kept within ±0.15 V. Such voltage partitioning ensures a more uniform current distribution across the light source, which helps manufacturers extend the service life of the light source.

 

　　Spectroscopy: is LED light bead Brightness is categorized as luminous flux or luminous intensity. For light sources, it is recommended to use luminous flux. We suggest purchasing LED products or those with a light-based, high-gloss finish, as they are energy-efficient and long-lasting.

 

　　The foregoing are several key principles for selecting LED chips. Only by thoroughly understanding these guidelines and incorporating them into your purchase contract can you effectively safeguard your rights and interests. Otherwise, you are bound to suffer losses—the seemingly attractive price of the chips is often a deceptive trap. Once caught in this trap, businesses will ultimately be forced to shut down and exit the market.

More information

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What are the tips for selecting LED chips?

1. Brightness: LED brightness varies, and so does the price. LEDs used in LED lighting must comply with laser safety classification standards.

What factors influence the price differences of LED light beads?

LED chips are a well-known product in the LED industry; however, many people are less familiar with their pricing. What causes such wide variations in LED chip prices? Below, we will outline the factors that influence LED chip prices.

What is the light-emitting principle of LED chips?

An LED chip is a light-emitting diode, and an LED bulb is simply the common, colloquial term for an LED.

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The brightness of full-color LED surface-mount devices is closely related to the LED’s viewing angle. The narrower the viewing angle, the higher the brightness; moreover, differences in manufacturing processes can lead to significant variations in service life. For a 5-mm LED with a 180-degree viewing angle, the white-light luminous intensity is only a few hundred mcd, whereas for a 15-degree viewing-angle LED, the luminous intensity exceeds 10,000 mcd. When high-power LEDs are used outdoors, the brightness is even greater. Single-power LEDs include 1 W, 3 W, and 5 W models; some high-power LEDs can be combined to form a single high-power LED with output up to several hundred watts. Color temperature is independent of brightness, but brightness is directly related to the lumen value.

Key Considerations for Full-Color SMD LEDs on the Side

Side-view full-color LED chips, also known as surface-mount LEDs, are a type of simple lighting device. Their light-emitting principle is based on passing an electric current through a compound semiconductor; when electrons and holes recombine, the excess energy is released in the form of light, thereby producing illumination.