SPMWH3228FD5WAP0S4 vs SPMWH3228FD5WAQ0S4
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| Category | LED Lighting - White | LED Lighting - White |
| Manufacturer | Samsung Electro-Mechanics | Samsung Electro-Mechanics |
| Description | LED LM281BZ COOL WHT 6500K 2SMD | LED LM281BZ COOL WHT 5700K 2SMD |
| Package | 1113 (2835 Metric) | 1113 (2835 Metric) |
| Series | LM281BZ | LM281BZ |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 1113 (2835 Metric) | 1113 (2835 Metric) |
| Supplier Device Package | 2835 | 2835 |
| Size / Dimension | 0.110" L x 0.126" W (2.80mm x 3.20mm) | 0.110" L x 0.126" W (2.80mm x 3.20mm) |
| Current - Max | 160mA | 160mA |
| Current - Test | 150mA | 150mA |
| Color | White, Cool | White, Cool |
| Height - Seated (Max) | 0.030" (0.75mm) | 0.030" (0.75mm) |
| Voltage - Forward (Vf) (Typ) | 3.1V | 3.1V |
| Viewing Angle | 120° | 120° |
| Flux @ 25°C, Current - Test | 67 lm (65 lm ~ 69 lm) | 68 lm (66 lm ~ 70 lm) |
| Lumens/Watt @ Current - Test | 144 lm/W | 146 lm/W |
| CCT (K) | 6500K | 5700K |
| CRI (Color Rendering Index) | 80 | 80 |
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1. What is LED and why use it?
LED (Light Emitting Diode) is an electronic component that uses solid-state semiconductor materials to generate light, and emits light by releasing energy through the recombination of electrons and holes. LED has the advantages of high efficiency, low power consumption, long durability and environmental friendliness.
Basic principle of LED
The working principle of LED is based on the recombination of electrons and holes in semiconductor materials to release energy and emit light. When current passes through semiconductor materials, electrons and holes recombine and release photons, thereby generating light. LED can efficiently convert electrical energy into light energy, and the color of light can be adjusted by controlling the current and voltage in semiconductor materials.
Application fields of LED
The application fields of LED are very wide, mainly including the following aspects:
Lighting field: LED lights are widely used in indoor and outdoor spaces such as homes, offices, and shops. Compared with traditional incandescent lamps, LED lights are more energy-efficient and have a longer service life.
Automotive lighting: LED lights are used in headlights, taillights, turn signal lights and brake lights in the automotive industry, which improves the lighting effect and reduces energy consumption, enhancing driving safety.
Signal indication: LED lights act as signal indicators in various devices and instruments, such as power and working status indicators on computer screens, mobile phones, and household appliances.
Decoration and advertising: LED lights are used for decorative lighting in architectural landscape design, and are also an important part of advertising media such as billboards and display screens.
Medical and health care: LED lights play a role in medical rehabilitation, such as light therapy, pain relief, and muscle training.
Industrial production: On industrial production lines, LED lights are used as a source of light for detection, operation, and control equipment.
What is a high-power LED lamp?
A high-power LED lamp refers to a light-emitting diode (LED) with a large rated working power. Its power is usually above 1 watt (W), and can even reach tens of watts (W). The working current can range from tens of milliamperes to hundreds of milliamperes 12. Compared with ordinary LEDs, high-power LEDs have greater power and higher brightness, but they also face higher costs and thermal management challenges.
Features of high-power LED lamps
High brightness: The luminous efficiency of high-power LEDs is more than 10 times higher than that of traditional incandescent lamps and about 2 times higher than that of fluorescent lamps.
Long life: The service life of high-power LEDs can reach more than 50,000 hours, which is more than 40 times that of traditional incandescent lamps.
Small size and high reliability: High-power LED devices are very small and have a long service life, so they have higher reliability.
Energy saving and environmental protection: High-power LEDs do not contain any harmful substances used for lighting, which is very environmentally friendly. -
2. What are the disadvantages of LED lights?
The main disadvantages of LED lights include heat dissipation problems, high cost, strong light directionality, limited color selection, and temperature sensitivity. LED lights need to solve the heat dissipation problem during the production process, because its heat management is an important challenge, which is usually handled by passive air cooling. In addition, the initial purchase cost of LED lights is high, mainly due to the advanced technology and materials used in its production process, but in the long run, its energy saving effect makes the return on investment still high.
The light of LED lights is highly directional, which may cause uneven lighting effects. To solve this problem, some lamps use special designs such as using multiple LED lamp beads or diffusers to provide more uniform lighting. In terms of color selection, although LED lights can emit a variety of colors, their selection is relatively limited because different semiconductor materials can only emit specific colors of light.
In actual applications, LED lights are sensitive to temperature, and their luminous efficiency and life may be reduced in high temperature environments. Therefore, care should be taken to avoid exposure to excessive temperatures during installation and use. In addition, LED lights require special drivers to provide constant current and voltage, which increases the complexity and cost of the system, but with the development of technology, integrated LED bulbs have reduced this complexity.
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3. What are the advantages of using LED?
The advantages of using LEDs mainly include the following aspects:
Energy saving and high efficiency: LED lamps are more energy-efficient than traditional lighting such as incandescent lamps and fluorescent lamps, and can usually save more than 50% of electricity consumption. LED lamps have higher conversion efficiency, which means lower power consumption at the same brightness.
Long life: The life of LED lamps far exceeds that of traditional lighting equipment, usually up to 20,000 to 100,000 hours, and some are even longer, reducing the frequency of replacement and maintenance costs.
Environmental protection: LEDs do not contain harmful substances such as mercury, have little impact on the environment after disposal, and are easy to recycle. In addition, the impact on the environment during the production and disposal of LED lamps is also small.
Excellent light quality: LEDs can provide purer colors and a narrower spectrum range, with rich color expression, suitable for places that require high-quality lighting.
Fast response: LEDs have an extremely short response time of about nanoseconds, which is suitable for application scenarios that require fast switching, such as traffic lights.
Adjustability: LEDs are easy to adjust light intensity, color and direction through electronic control, suitable for intelligent lighting systems, and meet personalized and dynamic lighting needs.
Safe voltage: LEDs operate at lower voltages, generally DC voltage, which makes them safer to use, especially for public places such as homes and schools.
Shock and vibration resistance: LED lamps do not have fragile parts such as glass filaments, are more resistant to shock and vibration, and are suitable for outdoor and harsh environments.
Strong directionality: LED light sources have strong directionality, which can more effectively direct light to where it is needed, reducing light pollution and waste.
Low temperature operation: LEDs generate less heat energy, reducing safety hazards caused by high temperatures, and also reducing the burden of air conditioning and refrigeration. -
4. How do LED lights work in physics?
The working principle of LED lights is based on the process of electrons and holes in semiconductor materials to produce photons. When current passes through the chip of the LED lamp, the electrons and holes inside the chip collide and recombine violently in the light-emitting layer to produce photons, which are the light we see. The core luminescent materials of LEDs are usually wide-bandgap semiconductor materials, such as GaN (gallium nitride), which have high luminous efficiency and good thermal conductivity.
Specific working process
Recombination of electrons and holes: When current passes through the PN junction of the LED, electrons and holes are pushed to the junction under the action of the electric field. When they meet, the energy level difference causes the electrons to jump from the high energy level to the low energy level, releasing energy in the form of light.
Emission of light: This process produces photons, which is the light we see. The color of the LED depends on the composition and structure of the semiconductor material used. For example, gallium nitride LEDs emit blue light, gallium phosphide LEDs emit red light, and green and yellow LEDs are achieved by changing the composition and structure of the material.
