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International Labour Day From:  www.hzleddriver.com      International Labor Day, also known as "May Day" or "International Workers' Day" (International Workers' Day or May Day), is a national holiday in more than 80 countries in the world.   It's on May 1 every year.   It is a holiday shared by working people all over the world. The origins of International Labour Day *         International Labor Day originated from the workers' strike in Chicago, USA. The main reason is that capitalists increase the working hours of laborers to increase the working intensity in order to increase production profits. On May 1, 1886, with the city of Chicago as the center, large-scale marches and protests were held in the United States, demanding improved working conditions and the implementation of an eight-hour workday. In order to commemorate this great labor movement, in July 1889, the Second International led by Engels announced in Paris that May 1 every year wo

What is the difference between DALI 1 and DALI-2? Everyone in the field of LED lighting knows that DALI system is the most advanced lighting control system in the world at present. The principle of DALI system ( What is DALI control system?-helvar  ) is probably based on multiple intelligent modules connected to DALI bus.   DALI bus signal can  be used to communicate with each intelligent module and transmit instructions and state information. It can not only control each lamp individually, such as linear control of brightness, color temperature, and color but also control the lamps in groups and set different scene modes and plans. Dali-2 refers to the latest version of the DALI protocol, which has many new commands and features compared to the DALI system.  The DALI system version only includes control devices, while Dali-2 includes control devices such as application controllers and input devices (such as sensors), as well as bus power supplies. Dali-2 updates on the original versi