The Challenges in Offroad LED Lighting

There was also an excellent presentation by Mark Hand of Acuity Brands Lighting on the challenge of cost-effective LED offroad lighting.Hand stated that pole cost and installation dominates the up-front cost of street lights.So LED lights that allow greater pole spacing have a huge economic advantage that can trump energy savings. Hand described the problem depicted in Fig.2. The goal is to put an equal number of foot candles (Xfc in Fig. 2) on the ground regardless of the distance from the pole. But longer throws have a narrower beam and the inverse square loss for light vs distance applies.The off road lights must output 9 times the lumens to reach the far end of the last zone relative to the first, meaning that glare becomes a huge issue for greater pole spacing. The-Challenges-in-Offroad-LED-Lighting

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