Derby Downtown Lighting & Signage Plan
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PHOTOMETRICS<br />
AMBIANCE PHOTOMETRIC CALCULATIONS<br />
Depiction of photometric calculations that represent acheivable light levels when fixtures are spaced according to the specified design guidelines.<br />
SIDEWALKS<br />
IESNA STANDARD PER GUIDELINES<br />
Min.<br />
Illuminance<br />
0.6 fc<br />
LOCAL ROAD COMMERCIAL<br />
IESNA STANDARD<br />
Avg. Uniformity<br />
Illuminance Ratio<br />
0.8 fc 6:1<br />
Min.<br />
Illuminance<br />
0.6 fc<br />
Photometric calculations assume two area fixtures will be placed at<br />
each entrance to the plaza and festoon lighting will be spaced 18 inches<br />
on center as shown.<br />
PER GUIDELINES<br />
Avg. Uniformity<br />
Illuminance Ratio<br />
2.0 fc 3.3:1<br />
Photometric calculations assume two area fixtures will be placed at<br />
each entrance to the plaza and festoon lighting will be spaced 18 inches<br />
on center as shown.<br />
<strong>Derby</strong> <strong>Lighting</strong> & <strong>Signage</strong> <strong>Plan</strong><br />
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