Derby Downtown Lighting & Signage Plan
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ACRONYMS & ABBREVIATIONS<br />
• AFG - At Finished Grade<br />
• B.U.G. - Backlight. Uplight. Glare.<br />
• CCT - Correlated Color Temperature<br />
• CRI - Color Rendering Index<br />
• FC - Foot-candle<br />
• IBC - International Building Code<br />
• IESNA - Illuminating Engineering Society of North America<br />
VISUAL AIDES<br />
• Color Quality - The color quality is determined by how well a person can visually recognize objects in their environment.<br />
Undesirable<br />
Desirable<br />
• Light Levels - The light levels were measured and this slider is in reference for how well they compare to the IESNA recommendations.<br />
Inadequate<br />
Adequate<br />
• Optical Performance - The optical performance sliders is in reference to how well a luminaire controls the light as it exits.<br />
No Cut-Off<br />
Full Cut-Off<br />
• Perception - The perception of spaces is largely a personal feeling, however, the ranking of perception was based up feelings of unease in locations at night due to the lack of lighting in on the vertical surfaces.<br />
Uncomfortable Comfortable<br />
• Uniformity - The uniformity of a space is determined based on how often there are luminaires and how well they are providing an even amount of light.<br />
Non-uniform<br />
Uniform<br />
• Visual Identity - The visual identity of a space is determined by how well all the luminaires in the space tell the same ‘story’.<br />
146<br />
Not Cohesive<br />
<strong>Derby</strong> <strong>Lighting</strong> & <strong>Signage</strong> <strong>Plan</strong>
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