opposing poles with 2,000 watt metal halide fixtures while Sochi deployed twenty 20-meter poles with LEDs.
In a project layout for a proposed halfpipe at Mammoth Mountain, the designed called for six staggered poles using seven 300 watt Snow-Bright™ magnetic induction fixtures on 35 foot poles to light a 560 foot length by 65 foot width; height was variable depending upon accumulated snow. Using magnetic induction eliminates glare and flicker issues. By staggering opposing poles, light is uniformly distributed without hotspots. Each pole compliments the opposing pole. Highest intensity occurs at the banks with as much as 192 fc. Intensities drop to a comfortable level just shy of 50 fc in the contact area.
The Mammoth Mountain halfpipe was specified for televised competition. At the recreational level, only half the fixtures would be required, saving on energy. Any project should be defined using a photometric layout based upon “IES files” provided by the fixture manufacturer. A white light with a color temperature of at least 5,000 Kelvin is recommended for visual clarity. Attention should be paid to eliminating forward shadowing to avoid landing into darkened areas. For recreational areas, lighting levels can be dropped to between 5 fc and 15 fc depending upon dimensional difficulty. Keep in mind that lighting controls can address competitions versus recreation use by simply raising or lowering the number of activated lamps. Dimming may also be applicable. JUMPS The 90 meter ski jump at Lake Placid, NY was built for the 1980
Olympics and used 1,000 watt metal halides for illumination. Lighting wasn’t sufficient for night competition, but could be used for practice runs and maintenance. A lighting renovation plan was requested in 2016 and subsequently updated. To be sure, this is a highly specialized lighting application that is not often required since there are very few such jumps in all of North America. These include Lake Placid (ORDA), Harris Hill, Suicide Hill, Howelsen Hill, and others. Key lighting objectives include low glare, uniformity, no flicker, high color temperature, forward lighting for shadow removal.
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