SPMWH3228FD5WAP0S4 vs SPMWH3228FD5WAU0S4
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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 WARM WHT 3500K 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, Warm |
| 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) | 65 lm (63 lm ~ 67 lm) |
| Lumens/Watt @ Current - Test | 144 lm/W | 140 lm/W |
| CCT (K) | 6500K | 3500K |
| CRI (Color Rendering Index) | 80 | 80 |
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1. What is the meaning of LED lighting?
LED lighting (Light-Emitting Diode Lighting) is a lighting technology that uses light-emitting diodes (LEDs) as light sources. LED lighting has the advantages of high efficiency and energy saving, long life, high brightness and environmental protection, so it is widely used in indoor and outdoor lighting.
The working principle of LED lighting
LED lighting is based on the principle of semiconductor light emission. When current passes through the LED chip, electrons and holes recombine in the semiconductor material, releasing energy in the form of light to form visible light. LED chips are usually composed of blue or purple light sources and corresponding phosphors. Through the luminescence conversion of phosphors, visible light of different colors can be produced.
Features of LED lighting
High efficiency and energy saving: LED chips can convert most of the electrical energy into visible light, and less energy into heat energy, so the energy consumption is low. Compared with traditional incandescent lamps, the energy efficiency of LED lighting is usually improved by more than 80%, effectively reducing the cost of electricity.
Long life: LED chips have high vibration resistance and vibration resistance, and are not easily affected by the external environment, so they have a long service life. Under normal circumstances, the life of LED lighting can reach tens of thousands of hours.
High brightness: LED lighting has high brightness and is suitable for various lighting needs.
Environmental protection: LED lighting does not contain harmful substances such as mercury and is environmentally friendly. -
2. 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. -
3. What is the principle of LED lights?
The principle of LED lights is based on the PN junction characteristics of semiconductor materials. LED (Light Emitting Diode) is a semiconductor device that directly converts electrical energy into light energy. Its core structure is a PN junction composed of P-type semiconductors and N-type semiconductors. When an external forward voltage is applied to the PN junction of the LED, the electrons in the N region will cross the depletion layer into the P region, and the holes in the P region will also cross the depletion layer into the N region. This process is called carrier injection. The electrons and holes injected into the other region recombine near the PN junction, release energy, and emit it in the form of photons to form visible light or near-infrared light.
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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.
