All roadway lamps must be designed according to specific standards. The most popular ones are a US standard called "IESNA RP 8-00 Roadway lightning" and a European one called "CIE 140-2000 Road lighting calculations". In the case of CIE 140-2000, the standard only...
Since the start of the LED lighting revolution, plastic optics have been made primarily from acrylic (PMMA), polycarbonate or a modified version of either material (for example PMMI). More recently, silicon-based optical materials have grown in market share. These...
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