The U.S. Department of Energy issued the first GATEWAY report based on a residential road in Portland, Midwestern United States. The road is named NE Cully Boulevard, and six different types of street lights have been installed. They are three led lights, a sensor light, a ceramic metal halide lamp, and a high pressure sodium lamp. The high pressure sodium lamp is the benchmark. The important results are as follows:

1. The performance of the installed product is not uniform, but the replacement lamp usually has higher energy efficiency, more reasonable light distribution and better light color than the replaced high pressure sodium lamp.

Figure: Light distribution of six lamps A: Philips (LED)

B:GE (induction light)

C: Cooper (LED)

D: GE (LED)

E: Philips (ceramic metal halide lamp)

F:GE (high pressure sodium lamp)


2. Some alternative lamps do not guarantee sufficient lighting for motorized lanes, bicycle lanes and sidewalks. Light failure problems may even result in products that do not meet the design criteria.

3. Due to the small size of the demonstration project and the small number of lamp purchases, the calculated minimum return on investment is 17.3 years (Cooper's LED), and the return on investment is shortened to 10 in accordance with the conventional large purchase price calculation. year.

4. The luminaires installed in the demonstration project are all equipped with a network control system. The recorded electricity consumption is compared with the electricity consumption measured by the site and the expected electricity consumption submitted by the manufacturer. It is found that most of the electricity values ​​match the expected altitude. , But one of the LED lights is obviously low, and low power consumption is certainly a good thing, but the accuracy of the reported value is more important. Utility tariffs and rated power are related.