1. What is a panel light?
Panel lights are also called flat lights and gusset lights. Commonly used places include kitchen, bathroom, living room, aisle and other home spaces, such as some kitchen and bathroom lights, integrated ceiling lights, etc. Offices, shopping malls, etc. are also often used. The principle of panel light, LED is usually used as the backlight of the display screen in the early days, and then gradually developed into a special lighting fixture. The original panel light uses the principle of LED backlight, the LED light source is on the back, and the light is projected directly through the diffuser plate, that is, the direct-type panel light. Some use the principle of side-emitting light guide, that is, the LED light source is around the lamp, passes through the light guide plate, and the reflector forms the effect of front projection. Also known as side-emitting panel lights. The common light sources of panel lights are LEDs, fluorescent tubes, etc., and now the most commonly used light sources are LEDs. 
2. Features of panel lights
The shape and size of the panel light
Panel lights are round, square, rectangular, special-shaped, etc., the most common are square and rectangular. regular size Square has 300cm*300cm 400cm*400cm 500cm*500cm 600cm*600cm Rectangular has 300cm*600cm 300*1200cm 600*1200cm Of course, it can be made into any required size The light source of the panel light mainly uses the LED light source
The panel light with LED as the light source has the advantages of long life, high luminous efficiency, low power consumption and low energy consumption. Due to the unique characteristics of the panel light, the LED panel light also has a large light-emitting surface, does not occupy space, has uniform light and a simple appearance. Convenient maintenance and other advantages, suitable for lighting in bathrooms, kitchens, offices, etc. The main structural part of the panel light
Aluminum frame, good heat dissipation performance, good texture, beautiful appearance The light source is now generally using LED lamp beads, and most of them use SMD lamp beads. Commonly used specifications are 3528 and 5050 two sizes. Light guide plate, because LED is a point light source, it is necessary to use corresponding optical design and materials, such as light guide plate, to export the light evenly. The diffuser plate is mostly made of acrylic, PC, etc. Its function is to evenly emit the light of the light guide plate Reflector, reflect the light on the back of the light guide plate to improve light efficiency Other components, such as the rear cover, mainly play the role of sealing and heat dissipation The commonly used driving power supply is constant current source or constant voltage constant current source. Installation components, there may be steel wires, brackets, screws, etc., to facilitate the installation of panel lights. The installation methods include surface installation, installation, hoisting, embedded installation, etc.
3. How to choose panel lights
Appearance characteristics of panel lights According to shape, shape, style characteristics
There are square panel lights, rectangular panel lights, round panel lights, and special-shaped panel lights, that is, irregular-shaped panel lights, such as leaf-shaped panel lights and diamond-shaped panel lights. It depends on your own preferences and existing decoration style.
Panel light size
The size of the panel light is 7 inches, 9 inches, 12 inches, etc. Usually the length of both sides is used to indicate the size of the panel light. The common ones are 300mm*300mm, 300mm*600mm, also written as 30cm*30cm, 30cm*60cm or 3030, 3060, Generally speaking, 300mm*300mm is suitable for a room of about 3-8 square meters, and the power is about 10W, while 300mm*600mm is suitable for a room of about 6-12 square meters, and the power is generally about 18W. Manufacturer's light source, optical design, structural design, and light output rate will vary. Common sizes include 300mm*1200mm, 600mm600mm and 600mm*1200mm and other different specifications. Of course, it can be customized as needed, but there will be quantitative requirements. Optical properties of panel lights
Comprehensive technical indicators include, Optical properties include spectrum, chromaticity, luminosity, such as peak wavelength of luminescence, spectral bandwidth, axial luminous angular intensity, color temperature, color tolerance, luminous flux, radiant flux, luminous efficiency, chromaticity coordinates, color purity, dominant wavelength , color rendering index, illuminance, light intensity, for white LEDs, color temperature, color rendering index, and illuminance are the most important technical indicators. We use it daily, and mainly use white light for lighting, focusing on light intensity, luminous flux, color rendering index, color temperature, etc. Color temperature of panel lights
Panel lights are usually installed in kitchens, bathrooms, offices, etc., where high brightness is required, so cold light is usually selected, and the color temperature is above 5000k. Of course, the color temperature of the panel light ranges from low color temperature to high color temperature, which can be selected according to your own needs. Brightness of Panel Light
The brightness of the panel light is usually related to its power and luminous flux. The greater the power, the greater the luminous flux, and the same light-emitting area, the brighter the panel light will be. According to the light emitting characteristics of the panel light, there are two types of panel lights One is backlit panel light. This type of panel light uses a diffuser plate and related optical design to mix light. It is generally thicker, with uniform light output and high brightness. One is the side-emitting panel light. This type of panel light uses the light guide plate to achieve the effect of uniform light output. The brightness is low, the process requirements are high, and it is generally thinner. Heat Dissipation Performance And Structure Design Of Panel Light Since LED is a semiconductor light-emitting device, it is greatly affected by heat, so its PN junction temperature and the overall heat dissipation performance of the lamp are very important. Generally, the top lamps and lanterns fully consider the heat dissipation structure of the LED from the packaging level to the overall lamps and lanterns, and also fully consider the beauty of the appearance and structure. Some expensive chips, leading technology and materials are used. Such as high thermal conductivity and long life chip adhesives, ultra-low thermal resistance materials, control of the overall thermal resistance, and the temperature of the light source module at the lowest possible temperature. In general, we should also consider using good heat dissipation structures and heat dissipation materials. , For example, the heat dissipation performance of aluminum materials is still OK. Poor heat dissipation performance will seriously affect the brightness and light decay of the lamp, which in turn affects the service life of the lamp. Electrical properties of panel lights
Power performance The common one is constant current drive, the higher the efficiency, the better, the higher the stability of the output current of the power supply, the better, that is, the smaller the ripple current, the better. The higher the power factor of the power supply, the better, which means that the influence of the power supply is small. The higher the efficiency of the power supply, the better, indicating that the power supply has high conversion efficiency and energy saving. Power Size
It can be selected according to the size of the room, the size of the lamps, and the required brightness. Generally speaking, the power of a panel light is closely related to its size. It can be combined with the size reference of the panel lights below. Panel Light Material
Frame Choose a high-strength frame to make the lamp more durable. Commonly used materials include aluminum alloy, PC, steel, etc. Diffuser Plate The function of the diffuser is to spread out the light evenly. It is necessary to choose materials with good light transmittance, such as acrylic, PC, PS, etc. Generally speaking, the light transmittance of acrylic reaches 92%, but the anti-aging effect is slightly poor, so To decide for yourself. Light Guide Plate The function of the light guide plate is to reflect the light and guide the light, which directly adjusts the light efficiency and light decay of the lamp. The function of the light guide plate is to reflect the light and guide the light, which directly adjusts the light efficiency and light decay of the lamp.
4.Summary
The panel light has a large light-emitting surface, which is very suitable for some places that need to be illuminated with a relatively large range and uniform light, such as kitchens, bathrooms, offices and other places. When used at home, panel lights are usually integrated in kitchens and bathrooms. For example, the integrated ceiling in the kitchen has the position of panel light.
Of course, paying attention to the quality of the panel light source, the power factor and efficiency of the driving power supply, the heat dissipation of the panel light structure, etc., is very helpful for choosing a good panel light.
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