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95 <br />Decreasing the setback can create shadows on the field of play and when too close can cause a <br />hazard for players. When considering decreasing pole setback, the lighting designer will <br />evaluate on -field lighting and safety along with off -site spill and glare concerns. <br />ML Why is photometry of the fixture important? <br />Fixture photometry defines the light distribution characteristics of a fixture, essentially describing <br />the shape and intensity of the beam. Since photometric characteristics differ between fixtures, <br />selecting a fixture with appropriate beam control is very important. <br />IV. Summary of Light - Structure Green features that control spill light and glare <br />• Reflector System — Hundreds of photometric patterns in their proper application provide <br />minimal spill light for each project <br />• Visor System — Multiple visor choices provide efficient light on the field and minimal spill <br />light <br />• Side Shift Beam Control — Beams can be adjusted within the luminaire horizontally and <br />vertically, enabling the lighting designer to custom fit light to the field. <br />• Die -Cast Housing — Protects the optics of the system from damage ensuring photometric <br />performance throughout the life of.,the system. <br />• Factory Aiming of the fixture to the tenth of a degree ensuring light is placed where it is <br />intended <br />The purpose of this document is to provide an educational reference for specific technical Issues that affect the quality and performance <br />of a sports lighting system. <br />Prepared by. Chad McSpadden <br />Draft data. July 31, 2001 <br />Released: May 23, 2002 <br />Revised: Nick Tippett,10/26107 <br />Musco products referenced or shown are protected by one or more of the following patents. U.S. Patents: 4712187, 4811181; 4994718; 5012398. 6076828: 5134657; <br />5181883; 5207747•, 6211473; 5229681; 5313378: 5337221; 5343374; 6377811; 5398478; 640MZP 5423281; 6428577; 6519690; 6695440; 6600537; 5896024; 6647681; <br />5707142; 6794387; 6800048; 5816691, 6868721; 6860733,,5887969; 69118426; 5944413; 6016389; 5038338: 6203178: 6220726; 6250586; 6340790; 6398392; 6446406; <br />6404196•, 6676277; 8881110; 6692142; 8833875.6929385; 69 034; 8988897; 7069572; 7059746; 7171793; 7176835; 7208968; 7216437; 7246782; D337168; 0353797; <br />D353911; D411098. Au*da Patents: 670082; 705971; 708912: 780683; 784165; 2002251908. Braazll Patents: P193057245; P196071745. Canada Patents: 89366; 2009148; <br />2028850, 2027033; 2035014; 2058281; 2080585: 2087064: 2103874; 2110014; 7100611; 2200516; 2204958; 2210226; 2217872; 2378279; 2376283; 2378318: 2407922; <br />2407924. China Patents: ZL95192709.7; 2130139428.7. EPC Patents: 440631; 804704; 821776; 1192793; 000376498.0002. France Patents: 440531. Gemrany Patent <br />440531. Greece Patent: 3032360. Hungary Patent 216501. Ireland Patents: 804704; 821776•, 1192793. Italy Patent 804704 Japan Patents: 3270932; 3651008 :3740581. <br />MeAco Patents. 176853. 183226; 196897; 241985. New Zealand Patents: 245820; 301212; 307706; 333808. Norway Patent DESIGNREQNR.: 79833. Russia Patent <br />61440. South Korea Patents: 292548; 406147: 405754; 561799. Spain Patent 440531. Sd Lanka Patent 13133. Taiwan Patent: 1263753. Vietnam Patent 9892. Other <br />patents pending. <br /># T130015 <br />Page 3 of 3 <br />