"Testing was conducted on a 2-way single-lane road approximately 400 meters in length with 12 streetlamp posts spaced approximately 25 meters apart. Performance was verified in terms of variance of Power Consumption (W) and Road Lighting Level (lux) from established baseline levels.
Key results of the month-long test include:
* a consistent 27.5% reduction in overall Power Consumption (W)
* average illumination of 20 lux (well above the minimum specified average of 12 lux)
* potential prolongation of lifespan of lamps due to reduction in the current drawn and heat produced".
From an early notice on the firm's web site we have a cost savings projection for the City of Linyi's installation: "The total annual electricity consumed by the particular segments of the street lighting system expected under the contract is estimated at RMB 11,000,000 (approximately US$1,329,064). As such, the annual energy cost savings to be generated is expected to total approximately RMB 3,124,000 (approximately US$377,454)".
Just imagine doing this in a majority of all highly developed and lit urban areas across the globe. What a gift to lovers of the night sky and to municipal budgets, not to mention the earth's climate. And while we're at it, lets go for all those shopping center parking lots as well.
The reason this won't be made absolutely mandatory in the US, with a decade long phase in period is what?
by: John Laumer