What is LED light?
LED (Light Emitting Diode), light-emitting diode, is a solid-state semiconductor device that can convert electrical energy into visible light, which can directly convert electricity into light. The heart of the LED is a semiconductor chip, one end of the chip is attached to a bracket, one end is the negative electrode, and the other end is connected to the positive electrode of the power supply so that the entire chip is encapsulated by epoxy resin.
The semiconductor wafer consists of two parts, one part is a P-type semiconductor, in which holes dominate, and the other end is an N-type semiconductor, where electrons are mainly. But when the two semiconductors are connected, a P-N junction is formed between them. When the current acts on the wafer through the wire, the electrons will be pushed to the P region, where the electrons and holes recombine, and then emit energy in the form of photons, which is the principle of LED light. The wavelength of light, which is also the color of light, is determined by the material that forms the P-N junction.
LEDs can directly emit red, yellow, blue, green, cyan, orange, purple, and white light.
Types and applications of LED lights
Portable Lighting
LED flashlight
1. Compact LED flashlight
A compact LED flashlight refers to a multi-head small flashlight that uses one AA battery or AAA battery, or a pocket flashlight or keychain flashlight that uses three button batteries.
2. Manual charging LED flashlight
There are two types of manual charging LED flashlights. One is that this kind of flashlight has a movable cylindrical magnet, which can slide in a coil when shaken by hand. The coil generates current and rectifies the battery to charge the battery, lighting an LED to emit light. The other type is a flashlight that drives the generator to rotate by hand. The price of this kind of flashlight is lower, but most of these manually-generated LED flashlights have poor reliability.
3. Multi-lamp type with three batteries
The number of lamp holders (ie, LEDs) ranges from a dozen to twenty or thirty, and most of them reach more than forty lamp holders. The shell of the flashlight is mostly made of aluminum alloy, and the switches of the flashlight are sometimes set at the rear, and some are set at the front side, and the front side switch is more convenient to use. Since the ignition voltage of the high-brightness LED is about 3V, this kind of LED flashlight with three AAA batteries can be directly lit without boosting, so the efficiency of the power supply is high, and only a small amount of energy consumption is limited. flow resistance. It should be noted that the more the number of LEDs, the better.
4. Single lamp head high power LED flashlight
Single lamp head high-power LED flashlight refers to a flashlight that uses a single LED with a power of 1W to 5W. The high-power LEDs used in this single-lamp flashlight are either domestic or imported. Generally speaking, imported high-power LEDs have a higher luminous effect, but the price is much higher. The biggest advantage of this single-lamp high-power LED flashlight is that it has a better condensing effect, but it still depends on whether the concentrator of the flashlight is well-made.
5. Plastic case rechargeable LED flashlight
Rechargeable flashlights with plastic casings are often cheaper multi-head LED flashlights with lead-acid batteries. This kind of flashlight has from five to more than 20 lamp heads, and also comes with a charger with a capacitor to reduce the voltage, which is also convenient for charging.
6. LED solar flashlight
LED headlights
Lamp on head
Light-emitting diodes are referred to as LEDs for short. Made of compounds containing gallium (Ga), arsenic (As), phosphorus (P), nitrogen (N), etc. A headlamp, as the name suggests, is a lamp worn on the head, which is a lighting tool that frees both hands.
Low light
1. LED house light
A house number light is a light fixture used to display numbers so that people looking for an address can quickly find it.
2. LED garden light
LED garden light is a kind of outdoor lighting fixture. Its light source uses a new type of LED semiconductor as the illuminant, which usually refers to outdoor road lighting fixtures below 6 meters. Its main components are LED light source, lamps, light poles, and flanges It is composed of 5 parts: plate and basic embedded parts. Because LED garden lights have the characteristics of diversity, beauty, beautification, and decoration of the environment, they are also called landscape LED garden lights.
LED has the characteristics of energy saving and high efficiency. It is mainly used in outdoor lighting in urban slow lanes, narrow lanes, residential quarters, tourist attractions, parks, squares, and other public places, which can prolong people’s outdoor activities and improve property safety.
The development of LED garden lights in the 21st century has been widely used in urban slow lanes, narrow lanes, residential quarters, tourist attractions, parks, squares, private gardens, courtyard corridors, and other public places on one side or two volumes of roads for road lighting, improving The safety of people’s travel at night is used to increase the time of people’s outdoor activities and improve the safety of life and property.
It can also change one’s mood, elevate one’s mood, and be able to change one’s perception, creating a palette-like night of light and dark. During the day, garden lights can embellish the city scenery; at night, garden lights can not only provide necessary lighting and life convenience, increase residents’ sense of security, but also highlight the highlights of the city and interpret the bright style, so that it has been used to this day and has developed into a mature industrial chain. Now many developed countries have installed such lamps in their yards, which are both beautiful and safe. If the venue allows, it is recommended to install this kind of light.
3. LED microscope light
The microscope ring light is an external light source for the microscope. The microscope must have a light source for observation. It is divided into a fluorescent ring light and an LED ring light. The difference is that the LED ring light uses a cold light source and has a longer service life than ordinary fluorescent ring lights. be long.
4. LED advertising projection light
LED advertising projection light is a newly developed light fixture, which utilizes the RGB and luminous properties of LEDs to create a product that can both illuminate and display the company’s LOGO on the wall.
Dynamic advertising picture projection light, advertising projection light, LOGO projection, and pattern picture projection light series is a brand-new advertising mediums. It belongs to a kind of projection advertising. It uses high-power projection equipment optical projection principle, and a high-brightness light source with a variety of dynamic effect attachments to project the advertising content on the produced light film onto the projected advertising surface required by the customer to form an outdoor or indoor dynamic advertising effect with great visual impact.
5. LED camera flash
Flash is also one of the ways to enhance exposure, especially in dimly lit places, it helps to make the scene brighter.
Flash is a photographic accessory that can emit strong light in a short period and is photosensitive. It is mostly used for instant lighting in dimly lit situations, and it is also used in brightly lit situations to locally fill the subject. Small size, safe to use, easy to carry, and stable performance.
6. LED desk lamp
Table lamps are generally used by students, so the quality requirements for table lamps are very high, mainly to protect the eyes. Therefore, when buying table lamps, you must have quality assurance before you can buy them, and it is best to choose a brand.
7. LED street light
LED street light refers to a street light made of LED light source, which has the unique advantages of high efficiency, safety, energy saving, environmental protection, long life, fast response speed, and high color rendering index, which is of great significance to the energy saving of urban lighting.
Road lighting is an important part of urban lighting. Traditional street lamps are often used. High-pressure sodium lamps emit light at 360 degrees. The disadvantage of large light loss has caused a huge waste of energy. At present, the global environment is deteriorating day by day, and all countries are developing clean energy.
With the rapid growth of the national economy, the contradiction between energy supply and demand in my country has become increasingly prominent, and there is a serious shortage of power supply. Energy saving is an urgent problem to be solved. Therefore, the development of new high-efficiency, energy-saving, long-life, high-color rendering index, and environmentally friendly LED street lamps is of great significance for urban lighting energy conservation.
Road lighting is closely related to people’s production and life. With the acceleration of urbanization in my country, LED street lights are gradually developing with the advantages of directional lighting, low power consumption, good driving characteristics, fast response speed, high seismic resistance, long service life, and green environmental protection. Into people’s field of vision, become the world’s new generation of energy-saving light sources with the advantages of replacing traditional light sources, therefore, LED street lights will become the best choice for energy-saving renovation of road lighting.
Advantage
1. Its characteristics – unidirectional light, no light diffusion, to ensure lighting efficiency.
2. The LED street light has a unique secondary optical design, which irradiates the light of the LED street light to the area that needs to be illuminated, further improving the lighting efficiency and achieving the purpose of energy saving.
3. The LED has reached 110-130lm/W, and there is still a lot of room for development, with a theoretical value of 360lm/W. The luminous efficiency of high-pressure sodium lamps increases with the increase of power. Therefore, the overall luminous efficiency of LED street lamps is stronger than that of high-pressure sodium lamps; (this overall luminous efficiency is theoretical the luminous efficiency of high-pressure sodium lamps above 250W is higher than that of LED lamps. ).
4. The light color rendering of LED street lamps is much higher than that of high-pressure sodium lamps. The color rendering index of high-pressure sodium lamps is only about 23, while the color rendering index of LED street lamps is above 75. From the perspective of visual psychology, to achieve the same brightness, the average illuminance of LED street lamps can be It is more than 20% lower than that of high-pressure sodium lamps.
5. The light decay is small, less than 3% in one year, and it still meets the road requirements after 10 years of use, while the high-pressure sodium light has a large decay, which has dropped by more than 30% in about a year. Therefore, LED streetlights are designed in terms of power usage. Can be lower than high-pressure sodium lamps.
6. The LED street light has an automatic control energy-saving device, which can achieve the maximum possible power reduction and save energy under the condition of meeting the lighting requirements of different periods. It can realize computer dimming, time-segment control, light control, temperature control, automatic inspection, and other humanized functions.
7. Long service life: It can be used for more than 50,000 hours and provides three-year quality assurance. The disadvantage is that the life of the power supply is not guaranteed.
8. High luminous efficiency: The use of chips of ≥100LM or more can save more than 75% of energy compared with traditional high-pressure sodium lamps.
9. Easy installation: no need to bury cables, no rectifiers, etc., directly connect to the lamp pole or nest the light source into the original lamp shell.
10. Excellent heat dissipation control: The temperature is controlled below 45 degrees in summer, passive heat dissipation is adopted, and the heat dissipation guarantee in summer is insufficient.
11. Reliable quality: The circuit power supply adopts high-quality components, and each LED has over-current protection, so there is no need to worry about damage.
12. Uniform light color: no lens is added, and uniform light color is not sacrificed to improve brightness, to ensure uniform light color without an aperture.
13. LED does not contain the harmful metal mercury, which will not cause harm to the environment when it is scrapped.
Combining the above principles, the energy-saving effect is remarkable, and the replacement of high-pressure sodium lamps can save more than 60% of electricity.
Low maintenance cost: Compared with traditional street lights, the maintenance cost of LED street lights is extremely low. After comparison, all investment costs can be recovered in less than 6 years.
Security lighting
LED miner’s lamp
Equipment for various underground mining operations
LED miner’s lamp is a miner’s lamp produced by using a high-brightness LED light source instead of traditional lamp beads as a luminous body, and with a lithium-ion battery. Compared with the traditional miner’s lamp, the LED miner’s lamp has the advantages of being small size, lightweight, and high-efficiency energy-saving lamp. This product can be used for portable lighting in various underground mining operations, tunnel operations, marine operations, maintenance operations, outdoor sports, hunting night fishing, inspection and exploration, soldier equipment, and other places.
Features
1. The shell is made of engineering plastics and bulletproof glass as a whole, with a fully enclosed structure, which can work in various harsh environments.
2. The power supply adopts a high-safety lithium-ion battery, which is non-polluting, has a large storage capacity, no charging memory, and no need to replace the battery fluid. It is a completely maintenance-free product.
3. The light source adopts LED cold light source, which saves energy by more than 70%, does not need to replace the bulb, does not generate electric sparks, and eliminates the mining accident caused by the miner’s lamp.
4. The miner’s lamp is equipped with a special charger, no additional charging equipment, and maintenance workers are required, and the charging cost is only one-sixth of the traditional one.
5. This product has automatic protection functions of overvoltage, overcurrent, and over-discharge, and is safe and explosion-proof.
6. Small size, lightweight overall structure (only 100-150g), no binding, the load is 1/15 of the traditional miner’s lamp, which greatly reduces the labor intensity of miners and improves labor productivity.
LED explosion-proof light
LED explosion-proof light is a kind of explosion-proof light. Its principle is the same as that of explosion-proof light, except that the light source is LED light source, which refers to various specific measures taken to prevent the ignition of surrounding explosive mixtures such as explosive gas environment, explosive dust environment, gas gas, etc. Measure light fixtures. LED explosion-proof lamps are the most energy-efficient explosion-proof lamps, widely used in oil fields – power plants – chemical plants – oil – troops.
One of the very important explosion-proof principles of LED explosion-proof lamps is to limit the temperature of the surface of the casing, the surface of parts or the surface of electronic components in contact with explosive gases and explosive dust, and to limit the temperature of the electrical contact surface to be lower than its minimum ignition temperature or ignition temperature.
LED explosion-proof lights used outdoors need to use waterproof drivers. LED explosion-proof lights used in gas stations need to be shockproof!
LED explosion-proof lights are suitable for fixed lighting in flammable and explosive places such as petrochemical installations, oil platforms, gas stations, oil pump rooms, transfer stations, and oil fields.
Explosion-proof mark: Exd II BT6, Exd II CT4, Gb
Protection class: IP66, IP67.
LED emergency light
The LED emergency light is powered by the emergency battery power supply. When the power is cut off, the explosion-proof lighting fixture for emergency lighting can be started immediately, and it can also be controlled by an external switch.
LED emergency lights are emergency lighting for workshops, warehouses, cable trenches, roadways, and other places.
LED security indicator
Function in different scenarios
1. Construction unit
It is even more necessary to turn on the warning lights during road construction, especially at night when the road conditions are unclear, it is easy to cause some accidents, and unfamiliar people can easily trip over and cause traffic jams, so setting up warning lights is very important. It is necessary and necessary to play a warning role.
2. The car is on the road
It is very common for some problems to occur occasionally during long-term driving. In the case of having to stop on the road, to ensure safety, drivers need to place hazard warning lights near the vehicle to remind oncoming vehicles to pay attention to the road ahead. Add obstacles, slow down and drive safely. A good performance warning light can expand the visual range of the hazard warning model, so that other driver groups can see the prompt more clearly. So try to use warning lights with good performance.
3. Security fixed security posts and police motorcycles are patrolling
When there are criminals who want to commit illegal incidents, they will be affected and prevent illegal actions. Those who are injured can seek help in time. It will serve as a warning and restraint to the criminals in a wider range, effectively control and reduce crimes, and maintain social order and stability. . There are LED strobe lights installed in the community and sidewalks, and everyone can see them with more attention, to better protect themselves and their families.
4. Friends who like to travel by bicycle
If you want to be convenient on the way, or if you have a flat tire, etc., you will have to stop the car. At this time, if it is a very dangerous thing to park in a curve, it is easy to cause traffic accidents. Therefore, this kind of convenient LED warning light plays a key role. And not only the role of roadside warning can also be used as a lock when necessary.
If you want to know more about LED lights, please feel free to contact us.
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