LED street light claims world first
13 June 2007
Opto-Electronics
As LED prices continue to plummet, they are reaching the point where they can compete with traditional lighting technologies in more and more applications. Now Neopac has launched what it claims is the world’s first 100 W ‘warm-white’ LED street light.
The light's emitter unit is composed of an alternating layout of six 10 W white colour and six 7 W amber colour NeoPac emitters. This combination results in a warm white emission spectrum with initial total luminance flux of 4680 lumens, of which 3000 lm are in white and 1680 lumens are in amber. This combination of white and amber light is important for safety reasons, because the air particle penetration of amber light is better than that of natural white light. The result is that the warm white light produced provides much better illumination than harsh white light in misty or foggy conditions.
By using 12 secondary asymmetric optical lenses, the lamp can also create patterns on the ground, such as a butterfly, says the manufacturer. This allows the street lights to be customised for individual applications, such as a company logo for a light mounted in a company's parking lot.
Thermal resistance is 0,5 to 0,75°/W, depending on the chip configuration. The total thermal resistance of the light between LED junction and ambient is controlled at under 0,3°/W. The heat generated by the LEDs is dissipated by an aluminium heatsink and proprietary micro heat pipes, keeping the LEDs' junction temperature below 55°C, which allows a continuous luminance flux of 4200 lumens to be maintained.
The range covers 150 W (9000 lm), 60 W (3000 lm), 40 W (2000 lm) and 20 W (1000 lm) units in natural white colour and 126 W (5960 lm), 102 W (4680 lm), 51 W (2340 lm), 34 W (1560 lm) and 17 W (780 lm) units in warm white colour. The units are protected by a durable metal casing and sealed optic housing to provide IP65 protection. The manufacturer claims a lifespan of over 50 000 hours.
For more information contact Neopac Lighting, [email protected]
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