The graph illustrates a dip of only 20% which assumes interpolation between strobes. When making an investment in lighting infrastructure, getting it right requires vigorous research and verification. For operations managers inclined to “test before you invest,” it is easy to use a watt meter to measure in- rush current on a demo fixture. See if the vendor is willing
to provide a unit for testing. If there is access to an oscilloscope, determine the actual flicker rate and intensity. You may find the actual dip is far more than 20% as the second graph depicts. NOTE: If LEDs are already deployed, it is possible to mount up- hill magnetic induction fixtures to remove forward shadowing without altering the existing lighting plan. Such lighting can be integrated into the LED fixture array, or mounted separately. MOGULS
One of the most technical lighting challenges encompasses mogul (bump) runs that fit into three categories; 1) recreational, 2) practice, and 3) competition. Recreational moguls usually naturally result from slope contours, snowfall, fall-lines, and ski patterns. They can also be intentionally formed by grooming. Practice moguls are machine groomed for recreation and training. Competition moguls are specified by FIS and/or the U.S. Ski & Snowboard Association. In all cases, illumination should be across, downhill, and uphill to eliminate shadowing, illuminate landings (forward progress), and provide contour visibility. Competition course considerations include: • Lighting Poles : Staggered on both sides of the run every 100 feet (~30m), alternating left and right to minimize shadow overlap. • Pole Heights : Between 25 to 40 feet (7.6 – 12m), depending on terrain steepness and mogul depth. • Beam Spread : Wide-angle fixtures (30°–60°) with neutral white color temperature (4000K–5000K… Snow-Bright™ magnetic induction is rated 6,500K) for optimal contrast. • Mogul Terrain : Represented with contour shading to highlight troughs and peaks. • Emergency Lighting Zones : Placed every 300 feet (~100m) along the centerline for backup visibility. • Finish Area : Clearly marked at the base of the run with additional lighting for deceleration and safety.
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