How many wattages of LED street light can replace a 400 watt high pressure sodium or halogen lamp?
How many wattages of LED street light can replace a 400 watt high pressure sodium or halogen lamp? There is a proportional relationship such as: LED street light: high pressure sodium lamp = 1:4 relationship. However, if you choose the number of wattages of street lamps
, you need to go through rigorous field tests to meet the LED street lamp industry standards.
the conditions to be tested and the area tested:
1. The test road width is 12m, the pavement material is concrete, and the street lamp
is tested on one side (the side street lights are off when testing), the street light
is 10 meters high, and the light arm is 1.5 meters long (about 0.9 meters from the road surface) , the elevation angle is about 10 degrees;
2. The test setting application area is 12m×33m, and the quality evaluation is based on the data of the area. Considering that the requirements for the lateral light distribution of the streetlights
of the narrow roads are not high, it is necessary to provide the data of the application area of 9m×33m for the road reference of different widths.
the test time and data:
The data is the average of three tests. The light decay is calculated based on the first and third results. The time span is 113 days, and the normal switching lights are on a daily basis (the total lighting time is about 1,200 hours).
the application of optical communication, application of light efficiency, lateral illumination uniformity evaluation indicators:
1. Applying the light pass to set the total light path of the road surface in the application area, and the calculation formula is the average illuminance × area of the application area;
2. Applying the light effect is to set the effective light effect of the road surface in the application area, and the calculation formula is to apply the light input power;
3. The lateral illuminance
uniformity refers to the concept of longitudinal illuminance uniformity, which is the ratio of the minimum illuminance to the maximum illuminance of the lateral measurement point of the road.
For more details or to help test the data, please feel free to contact Lebekan