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Page 2 of 3 89 <br />Lori <br />Some excellent resources attached for you. <br />Power point shows impact of compromising mounting heights. Same aiming <br />point, but shorter mounting heights negatively <br />impact the adjacent homes. This can be quantified in footcandle or candela <br />values which is why a horizontal illuminance <br />value at the property line is appropriate without the restriction on mounting <br />heights so that the players are safe because the <br />fields are lighted correctly AND the environment is as pleasing as possible. <br />Included NCHSAA and Little League lighting standards which are just 2 <br />examples of where minimum, not maximum, mounting heights <br />are called out. This is a major safety issue in designing a sports field correctly. <br />From Little League lighting standards <br />D. Glare for Participants Aiming Angles <br />To achieve placement of lights in positions that enhance playability, pole <br />heights, pole locations and <br />fixture placements should be as shown on the layouts in the appendix. Aiming <br />angles are a function of <br />both pole height and the distance from fixture to aiming point. Little League <br />minimum pole heights and <br />minimum aiming angles must both be met to be in compliance <br />From NCHSAA lighting standards <br />B. Vertical Aiming AnglesTo enhance playability on the field, reduce glare, <br />and minimize spill light, minimum pole heights should be defined in the project <br />specifications based on site conditions to ensure proper vertical aiming angles. <br />Refer to notes about minimum vertical aiming angles in the appendix. Certain <br />sites may require steeper vertical angles due to enhanced spill and glare <br />concerns. <br />The other technical bulletins I included you can use as needed to demonstrate <br />the importance of all components of a good lighting <br />design that provides a safe, pleasing environment for both players, spectators <br />and neighbors. <br />Call me once you have had a chance to review if you have any questions. <br />Thanks, Dina <br />10/22/2010 <br />11/22/2010 <br />