How should the contractor, businesses, and owners determine the street light wattage for projects like urban major roads, industrial parks, towns, viaducts, and other street light transformation projects? How many watts does the typical LED street light have?
The power of LED street lighting ranges from 20W to 300W, however, the majority of them are low-power models with wattages of 20, 30, 50, and 80.
Although high-power LED street lamps should be less than 250W, the standard street light is a 250W metal halide bulb. As the name suggests, a high-power LED street lamp is a new kind of LED semiconductor light source with a single power of more than 1 watt.
Nowadays, the average uniformity of road surface illumination for LED street lighting is 0.48, which is higher than the national conventional illumination level of 0.42, and the spot ratio is 1:2, which is consistent with the road illumination. The lowest light intensity at a distance of 16 meters is 4LUX, the actual 1/2 central light spot reaches 25LUX, the 1/4 central light intensity reaches 15LUX, and the overlapping light intensity is roughly 6LUX.
The street light lens material on the market today has enhanced optical properties, including a transmission rate of 93%, resistance to temperature extremes of -38 to +90 degrees, UV resistance, and a Pelosi rate of 30000 hours without modification. It has excellent potential for use in modern urban lighting. Dimming has little effect on other features, such as color or depth of dimming.
In normal conditions, there will be qualified and technical professionals to design street lights for you when we purchase LED street lamps from manufacturers of street lamps. Manufacturers of street lamps employ experts and salespeople that have a wealth of engineering application knowledge.
The following techniques are just meant as a guide:
1. Test region
The test area is 15 meters by 30 meters. The test road is 15 meters wide, the street light is 10 meters high, the lamp arm is 1 meter on an elevation angle of 10 degrees, and the street lamp is tested on one side. The 12mx30m data of the application area is supplied for reference and selection of roads of various widths since small roads have minimal needs for transverse light distribution of street lighting.
2. test results
The data is the three-times average value, and the light drop is computed using the first and third times' outcomes. The period of time is 100 days.
3. the use of the light pass, light efficiency, and assessment of illumination uniformity.
The optical efficiency calculation formula is optical pass divided by input power.
Average illuminance x area is how the optical pass is calculated.
The ratio between the lowest and highest light levels at measurement stations along the road's transverse direction is known as illumination uniformity.
How many street lights of what wattage should be put on the road should be paired with the manufacturer's street lamp impact when using street lamp engineering.
