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...
LED
先进的材料LED optics
byJohn|Oct 27, 2014|FAQ,illumination
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...
Could Cree reps be providing incorrect data? (it’s complicated)
byJohn|Apr 3, 2014|LED,optical engineering
Many of our LED optical design projects start with a simple calculation. Basically, we tell a client how much mechanical space they need to reserve for a lens to achieve the beam angle or pattern they want. In all cases, the larger the LED chip, the bigger the optic...
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