LED wall washers are also called line-type LED floodlights, etc., because of their long strip shape, others call it LED line lights, mainly used for architectural decorative lighting, as well as used to outline large buildings. The outline of the profile is similar to that of the LED floodlight. Compared with the circular structure of the LED floodlight, the heat dissipation device of the strip structure of the LED wall washer is better handled.
Basic parameters
There are many similarities between LED wall washers and guardrail tubes. Let us introduce its parameters:
1) Voltage:
The voltage of the LED wall washer is 220V, 110V, 36V, 24V, 12V, and so on, so we pay attention to the corresponding voltage when selecting the power supply.
2) Working temperature:
Because the wall washers are usually used outdoors, this parameter is more important, and the temperature requirements are higher. In general, the outdoor temperature we require can work at -40 ° C + 60 ° C.
However, the wall washer is made of aluminum shell with better heat dissipation, so this general wall washer can meet the requirements.
1) LED lamp beads :
The number of LEDs for general wall washers is 9/300mm, 18/600mm, 27/900mm, 36/1000mm, 36/1200mm.
2) Protection level:
This is an important parameter of the wall washer and an important indicator that affects the quality of the current guardrail tube. We have to carry out strict requirements. We use it outdoors, and it is required to have a waterproof rating above IP65. It is also required to have relevant Pressure resistance, chipping resistance, high and low temperature resistance, flame resistance, impact aging grade IP65 6 means: completely prevent dust from entering 5 means: flushing with water without any damage
3) Control mode There are currently two control methods for LED wall washers: internal control and external control. The internal control means that the external controller is not needed, and the designer designs the control system inside the wall lamp. The degree of effect cannot be changed. The external control is the external controller, and the effect can be changed by adjusting the button of the main control. Usually in large projects, customers can change their own effects. We all use external control. There are also many wall washing systems that directly support the DMX512 control system.
4) Color specifications:
2, 6, 4, 8 full color, colorful, red, yellow, green, blue, purple, white, etc.
5) Illumination angle: The illumination angle is generally narrow (about 20 degrees), medium (about 50 degrees), and wide (about 120 degrees). Currently, the most powerful LED wall washer (narrow angle) is the most effective. Projection distance is 20-50 meters
6) Mirror surface: glass reflective lens, light transmittance is 98-98%, not easy to atomize, can resist UV radiation
7) The light source generally adopts 1W and 3W LED as the light source. However, due to the immature technology, the current market is 1W, because 3W generates a large amount of heat, and the heat is not good.
The connection scheme diagram above parameters must be considered when we choose the LED high-power wall washer, in order to reduce the light loss caused by the light emitted by the LED tube for the second time, the illumination is better, and each LED tube of the wall washer will be taken There is a high efficiency lens made of PMMA. I now make the connection of the wall washers easier to understand through the control connection diagram.
principle:
LED wall washers are relatively large in size and heat dissipation, so the design is also greatly reduced in difficulty. However, in practical applications, constant current driving will not be done too well, and there are many damages. So how to make the wall washer work better, the focus is on control and drive, control and drive, let us learn together
LED constant current.
Regarding the high-power products of LED, we will all mention the constant current drive. What is the LED constant current drive?
Regardless of the change in the size of the load, the circuit in which the current of the LED remains unchanged is called LED constant current drive. If the wall washer uses 1W LED, we usually use 350MA LED constant current drive. The purpose of LED constant current drive is to improve the life and light decay of LED. The choice of constant current source is based on its efficiency and stability. I choose the high-efficiency constant current source as much as possible, which can reduce energy loss and temperature.
On how to design a high-efficiency constant current source, we will conduct a detailed analysis in "Being a Celebrity Advanced Application for LED Experts".
The application of led wall washer Let us analyze the main application of wall washer and the achievable effect
LED wall washers are controlled by built-in microchips. In small engineering applications, they can be used without controllers. They can realize dynamic effects such as gradation, jump, color flicker, random flicker, gradual alternation, etc., and can also be controlled by DMX. Achieve chasing, scanning and other effects.
Application place:
Monolithic buildings, historical buildings, exterior wall lighting. The building is exposed to light and indoor lighting. Green landscape lighting, billboard lighting. Specialized lighting for medical and cultural facilities. Bars, dance halls, entertainment venues, etc.
The trend of LED wall washers In recent years, LED wall washers have been widely used in various places, such as the lighting of the corporate buildings, the lighting of government buildings, the lighting of historical buildings, entertainment venues, etc. The scope of the coverage is also wider and wider, from the original indoor to the outdoor, from the local partial lighting to the current overall lighting, are the level of improvement and development;
Nowadays, LED wall washers have been heavily invested in lighting projects. In the next few years, LED wall washers will become an indispensable part of lighting projects.
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