Morrisville Unified Development Ordinance - June 2017

Article 5: Development Standards Section 5.15. Exterior Lighting 5.15.4. Fixture Requirements

Table 5.15.3.B: Light Levels and Uniformity Ratios for Light Emitting Diode (LED) Lighting

Light Level (foot-candles) [1][2]

Average Light Level to Minimum Light Level Uniformity Ratio

Type of Lighting

Maximum

Average

Minimum

Anchor Tenant in a Major or Neighborhood Shopping Center

n/a

3.0

0.2

4:1

Loading Dock

n/a n/a

2.25 2.25

0.2 0.2 0.2 0.2

4:1 4:1 5:1 4:1

Nonresidential Parking Lot

Vehicle Sales

15.0 15.0

n/a n/a

Vehicular Canopy

Notes: n/a = not applicable [1] Maximum and average light levels shall be a horizontal measurement at grade or ground level of light level points on a ten-foot by ten-foot point-by-point layout grid in the overall lighted area. They shall be a not-to-exceed value measured or calculated using only the area of the site intended to receive illumination. [2] Measurements and calculations for a new system (after 100 hours of burn-in) shall be multiplied by a maintenance factor of not greater than 0.85 foot-candles to determine compliance with the standards in this table.

(Ord. No. 2016-001, 05/10/2016)

Fixture Requirements

5.15.4.

A. Building Exterior

All fixtures designed to highlight building elements, entrances, signs, or other distinctive architectural features shall be affixed to the building where possible. (See Figure 5.15.4.A: Building Exterior Fixtures.) Fixtures shall be designed to illuminate the building, entrances, walkways or wall-mounted fascia signs. All wall packs shall be located at non- public entrances only.

Figure 5.15.4.A: Building Exterior Fixtures.

All High Intensity Discharge (HID) and Light Emitting Diode (LED) wall packs shall be full cutoff.

All fixtures should be mounted above the wall-mounted fascia sign whenever possible.

All fixtures shall be directed downward rather than upward, to the extent practicable. When upward aiming is used, placing low wattage fixtures with shields as needed close to the building to graze the facade is encouraged to minimize reflected light from windows and other surfaces that would be present from a flood design.

The following fixtures shall not be permitted:

a. Fixtures attached to poles designed to illuminate the exterior of a building;

b. Neon lights or lights that emit a color;

c.

Fixtures that create off-site glare;

d. Fixtures that flicker, rotate, or flash;

e.

Flood lights;

f. Fixtures designed to attract attention to themselves; or

g. Fixtures deemed architecturally non-compatible by the Planning Director.

June 23, 2017

Morrisville, NC

Page 5-142

Unified Development Ordinance