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Application of LED Light Source in Garden Landscape Lighting


This paper describes the characteristics of LED light source applied to landscape lighting. It is pointed out that many cities use LED light source lighting technology in the construction of urban garden lighting environment, which has produced good results and accumulated rich experience.

    The LED light source is generally called the fourth generation illumination source or green light source, and has the characteristics of high energy saving, environmental protection, long life, small size, and many changes. The LED light source is a light source that uses a light emitting diode as an illuminant. LED lighting products are lighting fixtures that are manufactured using LEDs as light sources.

    1. Basic characteristics of LED and precautions during use

    1.1 Photoelectric characteristics

    The greater the current that the LED flows through the LED over its current limit parameter, the higher its luminance. That is, the brightness of the LED is proportional to the current through the LED. However, green light, blue light and white light will be saturated under high current conditions, which not only greatly reduces the luminous efficiency, but also shortens the service life.

    1.2 Optical properties

    LEDs are available in red, orange, yellow, green, blue, purple, and white colors. According to the brightness, there are bright, bright, super bright, etc., the same kind of chip in different packaging modes, its brightness is also different. According to human vision, it can be divided into visible light and invisible light. According to the color of the illuminating color, it can be divided into various types such as monochrome, two-color, and colorful. The purity of the colors is different, the price varies greatly, and the current pure white LEDs are extremely expensive. At the same time, the light-emitting angles are different, and the light effects are different. Special care should be taken when using them.

    1.3 common LED electrical performance parameters

    (1) LED forward voltage. Different color LEDs have different forward voltage drop values under rated forward current conditions, red and yellow: between 1.8V and 2.5V, green and blue: between 2.7V and 4.0V. For LEDs of the same color, the forward voltage drop and light intensity are not exactly the same.

    (2) The rated operating current of the LED. The rated current of LEDs is different. The average LED current is generally 20mA, and the high-power LED current is generally 40mA or 350mA. Specifically, it should be selected according to the current parameter values provided by each package factory. Generally, the LED has a reverse current of IR=10A under the condition of reverse voltage VR=5V.

    (3) The power of the LED. LED power is also different, there are 70mW, 100mW, 1W, 2W, 3W, 5W, etc., so it is necessary to design a reasonable use of the circuit and configure the appropriate number of LEDs according to the selected LED, so that it fully meets the LED power supply. Rating.

    1.4 Temperature characteristics

    (1) The soldering temperature of the LED should be below 250, and the soldering time should be controlled between 3s and 5s. Care should be taken to avoid damage to the chip due to excessive LED temperature.

    (2) The brightness output of the LED is inversely proportional to the temperature. The temperature not only affects the brightness of the LED, but also affects its lifetime. In use, try to reduce the heat of the circuit and do some heat treatment.

Yiwu Fuwei e-commerce firm (IACS Co., Limited) is a very professional Led manufacturer who produces high quality outdoor led light. Our popular products are solar led lights, UFO lights, underwater lights and so on. If you have any question about the led product, please feel free to contact us.