induction lamps. For example, Snow-Bright™ automatically spreads light into slope contours. • Effective Pole Height: Calculate effective pole height by adding pole height above snow, snow depth, and vertical differential between poles. Poles should be at least 25 feet (7.6 meters ) above the snow surface to ensure coverage while optimizing pole spacing for energy efficiency. Consideration should be given to expected annual snow accumulation that can impact pole height above the surface. There are companies like Musco® Lighting that recommend and supply ski area lighting using high-intensity LEDs mounted on high poles measuring 60 feet (18.28 meters) or more. This allows the LED beam to spread over a wider area. This approach can flood an area beyond the intended targeted slopes. The result can be too much light encroachment. Generally, this type of design is more suitable for stadium and field illumination. 3. Pole Location and Luminaire Aiming Strategic pole placement and luminaire aiming achieve uniform light distribution, reduce infrastructure needs, and limit environmental impact: • Straight Trail Sections: Single-sided lighting can be used for narrow trails to save on infrastructure (wiring and pole installation), however bilateral lighting on both sides is best, particularly for wider trails. • Curved Trail Sections: Poles should be located to maintain continuous coverage around bends, with luminaires aimed to uniformly illuminate a skier’s path. The illustrations provided by NSAA for conventional lamps and LEDs are:
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