Avago is supporting Standard EN 12966-1 for variable message traffic signs with new 5 mm extra high brightness LED lamps. The company’s new LED products to support the variable message traffic sign requirements for 15° and 30° viewing angles are the HLMP-Ex1A/1B-xxxDV (15°) and HLMP-Ex3A/3B-xxxDV (30°). They have luminous intensity ratings of 12 000 mcd (15° LEDs) and 5500 mcd (30° LEDs) and are available in red and amber colours.
The visual requirements of signs set the viewing angle of the LEDs. Signs installed on highways, for example, require bright LEDs with a narrow beam width, but in cities with a requirement for short distance legibility a wide beam width LED is usually required. Outdoor message signs must typically operate for over 10 years in a harsh, corrosive and exposed working environment. Avago’s new lamps are manufactured for outdoor signal and sign applications. The maximum LED junction temperature limit of +130°C enables high temperature operation in bright sunlight conditions. The lamp epoxy uses UV inhibitors to reduce the effects of long term exposure to direct sunlight.
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