1. What is a panel light
Panel lights are also called flat lights, gusset lights. Commonly used places include kitchen, bathroom, living room, aisle and other household spaces, such as some kitchen and bathroom lights, integrated ceiling lights, etc. It is often used in offices, shopping malls, etc.
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 is based on the principle of LED backlight, the LED light source is on the back, and the light is directly projected down through the diffusion 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 a frontal projection effect. Also known as side-emitting panel lights.
Common light sources for panel lights include LEDs, fluorescent tubes, etc., and LED light sources are most commonly used now.
Second, the characteristics of the panel light
The shape and size of the panel light
There are round, square, rectangular, and special-shaped panel lights, and the most common ones are square and rectangular.
regular size
Square has 300cm*300cm 400cm*400cm 500cm*500cm 600cm*600cm
The rectangular ones are 300cm*600cm 300*1200cm 600*1200cm
Of course, it can be made into any required size according to the needs.
The light source of the panel light mainly uses 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, which are common to LED lamps. Environmental protection
Due to the unique characteristics of the panel light, the LED panel light also has a large light emitting surface, does not take up 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
As the light source, LED lamp beads are generally used now, and most of them are SMD lamp beads. Commonly used specifications are 3528 and 5050 in two sizes.
As for the light guide plate, since the LED is a point light source, it is necessary to use corresponding optical design and materials, such as a light guide plate, to guide the light evenly.
Diffusion plate, the material is mostly acrylic, PC, etc., the role is to evenly emit light from the light guide plate
Reflector, reflect the light from 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 driving power supply is commonly used with 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 and so on.
3. How to choose panel lights
The appearance characteristics of the panel light are based on the shape, shape and style characteristics
There are square panel lights, rectangular panel lights, round panel lights, and special-shaped panel lights, which are irregular-shaped panel lights, such as leaf-shaped panel lights and diamond-shaped panel lights. The specific need 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. The 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 specifications. Of course, it can be customized according to needs, but there will be quantity requirements.
Optical performance of panel lights
Comprehensive specifications include,
Light performance includes spectrum, chromaticity, luminosity, such as luminous peak wavelength, spectral bandwidth, axial luminous angle intensity, color temperature, color tolerance, luminous flux, radiant flux, luminous efficiency, chromaticity coordinates, color purity, dominant wavelength , color rendering index, illuminance, and 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, and you can choose according to your needs.
Brightness of panel lights
The brightness of the panel light is usually related to its power and luminous flux. The greater the power, the greater the luminous flux. The same light emitting area, the brighter the panel light will be.
According to the light characteristics of the panel light, there are two types of panel lights
One is the back-lit 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 a side-emitting panel light. This type of panel light uses a light guide plate to achieve uniform light output. The brightness is low, the process requirements are high, and it is generally relatively thin.
Heat dissipation performance and structural design of panel lights
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, top-level lamps fully consider the heat dissipation structure of the LED from the packaging level to the overall lamp, and also fully consider the appearance of the structure. Using some expensive chips, leading technology and materials. Such as chip adhesive with high thermal conductivity and long life, ultra-low thermal resistance materials, control 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. , such as the heat dissipation performance of aluminum materials is still possible. Poor heat dissipation performance will seriously affect the brightness and light decay of the lamp, and then affect the service life of the lamp.
Electrical performance of panel lights
power performance
The common one is constant current drive, the higher the efficiency, the better, and the higher the stability of the output current of the power supply, that is, the smaller the ripple current, the better. The higher the power factor of the power supply, the better, which shows that the influence of the power supply is small. The higher the efficiency of the power supply, the better, indicating that the conversion efficiency of the power supply is high and energy saving.
power size
It can be selected in combination with the size of the room, the size of the lamp, 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 light below.
Material of panel light
frame
Choose a high-strength frame to make the lamp more durable. Commonly used materials include aluminum alloy, PC, steel, etc.
Diffusion plate
The role of the diffuser is to diffuse 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 You have to choose for yourself.
light guide plate
The role of the light guide plate is to reflect light and guide light, which directly affects the light effect and light decay of the whole lamp. The role of the light guide plate is to reflect light and guide light, which directly affects the light effect and light decay of the whole lamp.
Panel light installation method
The advantage of concealed installation is that it is beautiful and generous, but the brightness is affected.
Concealed installation and embedded installation are generally used for the installation of integrated ceilings, and the installation is relatively simple. Take off the cover plate and install it with the lamp spring buckle.
Concealed installation There is also an installation for traditional suspended ceilings, which requires a carving knife to carve out the installation range, and the installation process is a little complicated.
The advantage of exposed installation is that the brightness can be fully utilized, but the aesthetic effect varies from person to person
The common surface installation method is hoisting installation, which requires the use of suspension wires.
Look at the workmanship of the panel light
We usually cannot see the quality of many internal electrical characteristics of the panel light intuitively, but whether the workmanship is fine or not reflects the quality of the product to a certain extent.
Sealing of panel lights
The housing of the panel light has a simple design and good sealing performance, which can prevent dust from entering and bring convenience to maintenance and cleaning.
Waterproof condition of the panel light
Because panel lights are often used as kitchen and bathroom lights, and the environment is relatively humid, even if they are used in dry areas of kitchens and bathrooms, panel lights must have a certain waterproof level to adapt to use in kitchens and bathrooms.
Certification of Panel Lights
Generally, 3C certification is required.