Outdoor lights are indispensable for our lives and they can provide us with light and warmth at night. Outdoor lights can be classified into many types, such as street lights, garden lights, flood lights and post lights, etc. Street lights are usually placed along the roads and occupy an important position in the public lighting system. Their job is to light up the roads, improve road safety and enhance the beauty of the city. Garden lights are mainly used for decoration. These lights can be adjusted in any shape, so they are widely used in gardens or courtyards. With garden lights, the garden becomes more attractive and dynamic. Flood lights are usually used for places where need to be illuminated for a long time such as stadiums, ports, building walls, courtyards and other places. They have wide-angle illumination, good uniformity and high efficiency. Post lights are generally attached to street lamps lighting poles to illuminate adjacent roads. It has a waterproof design, strong wind resistance and high luminous efficiency. Outdoor lights play an important role in our life. They not only illuminate our night, but also bring us a trace of warmth.