What is an LED light? Shenzhen Huapu New Energy Technology Co., Ltd., a professional LED lamp manufacturer, shares the basics of LED lighting.
1. LED stands for Light Emitting Diode, a solid-state semiconductor device that converts electrical energy directly into visible light. At its core is a semiconductor chip. One end of the chip is connected to a bracket and acts as the negative terminal, while the other end connects to the positive side of the power source. The entire chip is then sealed with epoxy resin. This semiconductor chip consists of two parts: one is P-type, where holes dominate, and the other is N-type, where electrons are dominant. When these two meet, they form a PN junction.
When current flows through the wire, electrons move toward the P region, where they combine with holes, releasing energy in the form of photons—this is how LED lighting works. The color of the light depends on the material used in the PN junction. Initially, LEDs were used as indicator lights for instruments. Later, various colored LEDs became widely used in traffic signals and large displays, offering significant economic and social benefits. For example, a 12-inch red traffic light once used a 140-watt incandescent bulb, which produced 2000 lumens of white light. After passing through a red filter, only 200 lumens of red light remained. Today, Lumileds uses 18 red LEDs that consume just 14 watts to achieve the same brightness.
LED technology is also widely used in automotive signal lights. For general lighting, white light is needed. In 1998, white LEDs were successfully developed by combining a GaN chip with YAG phosphor. The GaN chip emits blue light (λp=465nm), which excites the YAG phosphor, causing it to emit yellow light at 550nm. The combination of blue and yellow light produces white light. By adjusting the composition of the YAG phosphor and the thickness of the layer, different color temperatures can be achieved, such as warm white (3500-10000K). This method is simple, cost-effective, and technologically mature, making it the most commonly used approach for producing white LEDs.
Second, the difference between LED fluorescent lamps and traditional fluorescent lamps. Traditional fluorescent lamps have filaments at each end, filled with argon and mercury vapor, with phosphor-coated walls. When electricity passes through, UV light is emitted, exciting the phosphor to produce visible light. These lamps require high voltage to start and operate at lower voltages during normal use.
LED fluorescent lamps, on the other hand, offer superior quality, durability, and energy efficiency. A 15W LED can provide the same brightness as a 40W fluorescent lamp. They are resistant to high temperatures, moisture, and leakage. Available in 110V or 220V, with glass or PC covers, and compatible with standard fluorescent lamp bases. LED lamps save over 70% energy, last 10 times longer, and require almost no maintenance. They are environmentally friendly, soft on the eyes, and promote better health.
Advantages of LED fluorescent lamps include energy savings, long lifespan, flexibility in design, fast response time (nanoseconds vs. milliseconds), eco-friendliness, and vibrant colors. However, they do have some disadvantages, such as higher initial costs, current gaps in light efficiency, limited lifespan compared to theoretical expectations, heat generation, and light degradation over time. Despite these challenges, advancements in technology are gradually overcoming them.
Third, the design concept. The rise of LEDs has revolutionized traditional lighting design, introducing two new approaches: Scenario Lighting and Emotional Lighting.
Scenario Lighting, introduced by Philips in 2008, focuses on creating a specific atmosphere based on the environment. It enhances the visual experience and makes people feel immersed in the space. Emotional Lighting, proposed by Kaisio in 2009, emphasizes human emotions, aiming to create a mood-based lighting environment. While both types aim to improve user experience, Emotional Lighting is dynamic and more focused on psychological well-being, whereas Scenario Lighting is static and more about setting the scene.
Fourth, development prospects. White LEDs have seen rapid progress in luminous efficacy. In 1998, it was only 5 lumens per watt, but by 2015, it reached 150-200 lumens per watt. With this advancement, LEDs are becoming a viable replacement for traditional light sources. Companies like Hella have already used LEDs in aircraft reading lights, and cities like Canberra have adopted them for street lighting. China is also replacing traditional traffic lights with LEDs. As technology continues to evolve, it's clear that LEDs will soon become a common household lighting solution.
LED light sources offer numerous advantages, including low voltage operation, low energy consumption, high stability, environmental friendliness, and versatile color options. Although initially more expensive than traditional lighting, their long-term benefits make them an inevitable choice for the future.
Fifth, LED characteristics. LEDs are small, lightweight, and highly efficient. Operating at 2-3.6V with currents of 0.02-0.03A, they consume less than 0.1W. Their lifespan can exceed 100,000 hours, and they are durable, non-toxic, and recyclable.
Finally, LED effects. The biggest advantage of LED lighting is energy efficiency and environmental protection. With a luminous efficiency of over 100 lumens per watt, LEDs outperform traditional incandescent bulbs (40 lumens/watt) and energy-saving lamps (around 70 lumens/watt). A 1W LED is equivalent to a 2W energy-saving lamp in brightness. A 5W LED consumes only 5 kWh over 1000 hours and lasts up to 50,000 hours without harmful radiation.
For more information or to place an order, contact us 24/7 at 400-006-9965. We're here to help!
Steel Buildings,Steel Structure Warehouse,Steel Structure Building,Steel Fabricated Building
Guangdong Tianchen Steel Structure Engineering Co. Ltd. , https://www.tcsteeltech.com