How  choose the wattage of LED street lights?

　　For street lamp projects, including urban arterial roads, industrial parks, wnships, viaducts and other street lamp renovation projects, how should contracrs, enterprises, and owners choose the wattage of street lamps?

　　Generally speaking, when you buy street lamps from street lamp manufacturers, professional technicians will design street lamp retrofit schemes for you. The technicians and salesmen of street lamp manufacturers have rich experience in street lamp engineering applications. The following methods are for reference only:

　　Test area

　　The test road is 15 meters wide, the street lamp is 10 meters high, and the lamp arm is 1 meter elevation angle of 10 degrees. The street lamp is tested on one side; the test area is 15mx30m, considering that the narrow road does not require high horizontal light distribution of the street lamp, and the application is provided at the same time The data of the area 12mx30m is for reference selection of roads of different widths.

　　Tested data

　　The data is the average of three times. The light decay is calculated based on the first and third results, and the time span is 100 days.

　　Application of luminous flux, luminous efficiency, illuminance uniformity evaluation

　　The calculation formula of luminous efficiency is luminous flux divided by input power;

　　The calculation formula of luminous flux is average illuminance x area;

　　The uniformity of illuminance is the ratio of the minimum illuminance  the maximum illuminance of the measuring point in the lateral direction of the road.

　　In the application of street lamp engineering, how many wattage street lamps should be installed on the road should be combined with the street lamp effect of the manufacturer. On the same road, a 100W LED street lamp provided by manufacturer A can meet the lighting requirements, while the street lamp provided by manufacturer B may meet the lighting requirements as long as 80W or even lower wattage is required.