Most of us have experienced this when taking plane: On a clear night, look out the window of an airliner and most of the city below is bathed in a bright orange glow. This is mainly because the light is produced by thousands of high-pressure sodium lamps. "From the sky, most cities look like orange blobs," said lighting expert Ron Bednarick.
However, with the road lighting revolution, LED lights gradually replaced the high-pressure sodium lamp due to these advantages of longer service life and better light etc, all this is beginning to change.
It is estimated that the total number of street lights in the United States is 45 to 55 million.Among them, most street lamps are high-pressure sodium lamps, and a small part are metal halide bulbs.
"The rate of adaption has probably tripled in the last two years," said Lighting expert Ron Bednarick. "The quality of light has improved dramatically with LED fixtures, and the cost savings have been significant."
He believes that LED street lights have 3 advantages as below:
Firstly, the light from the well-designed LED street lights is clear, controllable and beautiful. Precisely designed optics in LED fixtures ensure that light hits where it belongs, which means less light is wasted.
