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The technical principle of LED wall washer
- 2018-06-25-

In recent years, led high-power wall washers have been widely used in various places, such as the lighting of the corporate building, the lighting of government buildings, the lighting of historical buildings, entertainment venues, etc. More and more wide.

First, the basic parameters of led high power wall washer

Led high-power wall washers and guardrail tubes have many similarities. Let us first introduce the parameters of led high-power wall washers:


The voltage of led high-power wall washer can be subdivided into: 220V, 110V, 36V, 24V, 12V, several, so we pay attention to the corresponding voltage when selecting the power supply.

2. Working temperature

Because led high-power 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.

3.led lamp beads

The number of LEDs for general wall washers is 9/300mm, 18/600mm, 27/900mm, 36/1000mm, 36/1200mm.

4. Protection level

This is an important parameter of the wall washer, and it is also an important indicator affecting the quality of the current guardrail tube. We have to carry out strict requirements. We use it outdoors, and it is good to require the waterproof level to be above IP65. Also require relevant pressure resistance, chipping resistance, high and low temperature resistance, flame resistance, impact aging grade IP65, 6 means complete prevention of dust entry; 5 means: rinse with water without any damage.

5. Control method

For led high-power wall washers, there are currently two control methods: 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.

6. Color specifications

2, 6, 4, 8 full color, colorful, red, yellow, green, blue, purple, white, etc.

7. Illumination angle

The illumination angle is generally narrow (about 20 degrees), medium (about 50 degrees), and wide (about 120 degrees). Currently, the effective projection distance of high-power LED wall washers (narrow angle) is 20-50 meters.

8. Mirror

Glass reflective lens, light transmittance is 98-98%, not easy to atomize, can resist UV radiation

9. Light source

Generally, 1W and 3WLED are used 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 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 have a High efficacy lens made of PMMA. I now make the connection of the wall washers easier to understand through the control connection diagram.

Second, the working principle of led high power wall washer

Due to the large volume and high heat dissipation of led high-power wall washers, the design has also greatly reduced the difficulty. However, in practical applications, the constant current drive will not be too good, and damage will not occur. Less, so how to make the wall washer work better, the focus is on control and drive, control and drive, let us study together.

1.led constant current regulator

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 of the load size, the circuit whose LED current remains unchanged is called led constant current drive. If the wall washer is used with 1W led, we are usually 350MA led constant current drive, the purpose of driving with led constant current 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.

2.led application of high power wall washer

Let us analyze the main application of the wall washer and the achievable effect. The led high-power wall washer is controlled by the built-in microchip. In small engineering applications, it can be used without a controller, and can realize the gradual change and jump. Dynamic effects such as flickering, random flickering, and gradual alternation can also achieve the effects of chasing and scanning through the control of DMX.

3. Application place

Application place: single building, historical building group exterior wall lighting. The building is exposed to light and indoor lighting. Green landscape lighting

Led high power wall washer billboard lighting. Specialized lighting for medical and cultural facilities. Bars, dance halls, entertainment venues, etc.

4.led trend of high power wall washers

In recent years, led high-power 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. More and more wide, from the original indoor to outdoor, from the local partial lighting to the current overall lighting, are the level of improvement and development, with the times of progress, the current LED wall washer manufacturers have put a lot of investment into it In the lighting projects in various fields, in the next few years, led high-power wall washers will become an indispensable part of the lighting project.