As a light source with high luminous efficiency, energy saving, long service life and easy maintenance, LED has been applied in many night scene lighting projects. However, it is precisely because of the characteristics of small size, high brightness, and PN junction characteristics of LEDs that there are many new problems in the evaluation of LED quality. Judging the quality of a LED, can not be generalized. Because in different applications, the performance requirements of LED products are also different. For example, the LEDs used for display focus on parameters such as brightness, viewing angle distribution, and color. For LEDs used for general lighting, parameters such as luminous flux, color, and color rendering characteristics are important. In addition, to judge the quality of LEDs, we also need to comprehensively evaluate the parameters of optical, electrical, and thermal radiation safety and life.

The commonly used frequency of radio remote control is 433mHz or 315mHz, also referred to as 433 remote control and 315 remote control. The wireless remote control uses the open frequency band stipulated by the state. If it does not exceed the scope of this unit, it can be used freely without the approval of the "Radio Management Committee". My country's open frequency band is specified as 315mHz, while Europe and the United States and other countries specify 433mHz, so products exported to the above countries should use 433mHz remote control; there are three types of coding methods commonly used in radio remote control, namely fixed code, learning code and rolling code. The learning code and the rolling code are upgraded products of the fixed code. The rolling code remote control is currently the most secure. At present, the rolling code method is used in all occasions with high confidentiality requirements.

Due to the application of swimming pool and fountain lamps under water, there are high requirements on the waterproof performance, anti-leakage design, anti-alkali corrosion technology and other aspects of the lamps. Now those low-priced swimming pool lamps on the market still need to be tested in the aspects of product safety, waterproof performance, light source and quality, after all, the cost is there. So choose these engineering products must not blindly pursue the low price, must control the quality of the product, electrical waterproof performance, this is the most important. After all, water is a conductor, and poor quality products can easily threaten people's lives. It is suggested to select the following standards for pool lamps: multi-waterproof (with the highest waterproof certificate of IP68), low-voltage design (generally 12V or 24V, because the human safety voltage is less than or equal to 36V), anticorrosive and c