The PV lighting road, about 10,000 meters long, is located in the national highway of 104 between the east of the Development Zone of Dezhou and the boundary of ling country. It’s the world longest national highway illuminated by solar lamps. The lamps have more than 5 different designs and the led lights outlining the battery boards have drawn up beautiful scenery along the 104 highway. In addition, the Changhe Park in the Development Zone of Dezhou, with an area of 1.2 million M2, adopts many kinds of solar lamps to light and beautify the park.