WS Item 4
Work Session 693-C Outdoor Lighting
Item 4
Presentation
Background
Light Emitting Diode (LED) Lighting Basics
Benefits of LED Lighting
Proposed Ordinance Changes
Next Steps
Purpose/Background
Strategic Alignment
C1 Achieve the highest standards of safety & security
B6 Optimize use of technology
Southlake 2030 Goals and Objectives - 7.2- Promote public awareness and education on such sustainability issues as public health, energy and water conservation and overall environmental
stewardship.
Southlake 2030 recommendation: As development continues, light pollution is an increasing problem in North Central Texas -- Evaluate options for addressing and reducing light pollution
City Council Ordinance Priority Schedule
C4 Attract & keep top-tier businesses to drive a dynamic & sustainable economic environment
LED Basics
LED Lighting
Benefits of LED Lighting?
Energy Savings
C4 Attract & keep top-tier businesses to drive a dynamic & sustainable economic environment
Greatly Extended Life
LED - 70,000 hours
High Pressure Sodium – 24,000 hrs.
Metal Halide – 12,000 hours
B6 Optimize use of technology
Public Safety
C1 Achieve the highest standards of safety & security
Uniformed Lighting
Standard HID Lighting
LED Lighting
C2 Provide travel convenience within City & region
Architectural Enhancement
C3 Provide attractive & unique spaces for enjoyment of personal interests
Light Pollution/Dark Sky
C3 Provide attractive & unique spaces for enjoyment of personal interests
Environment
C1 Achieve the highest standards of safety & security
Market
Source: McKinsey & Company
B6 Optimize use of technology
Proposed Ordinance Changes
Define color temperature ranges
Permit LED luminaries on poles over
42” in height and exterior wall mounted
light fixtures
Color Temperatures
Color Temperatures over 4,200 K are called cool colors (blueish/white)
Color Temperature at 3,000 K – 4,200K are called neutral colors
Color Temperatures below 3,000K are called warm colors (yellowish white through red).
Temperature Ranges
Temperature Ranges
Temperature Ranges
LED (left side of road) HPS (right)
Questions
Requested Action
Approve Proposed Ordinance 693-C Amending Ordinance 693-B Requirements for Outdoor Lighting
Background Information
Purpose of Ordinance
Preserve nighttime enjoyment
Protect Drivers from glare
Provide design standards to prevent glare
Promote Energy Efficiency
Background Information
Current Outdoor Lighting Ordinance
References High Pressure Sodium (HPS) lights
Limits use of Light Emitting Diodes (LEDs )
LED Technology
Smaller Lamp- Less Heat
More Energy Efficient
No Dangerous Chemicals
LED Technology
Shielding Design - Provides Glare-Free Light
Better Direction - Puts Light Where Needed
Reduced Glare = Enhanced Visibility & Safety
LED Potential
Recognized by Lighting Engineers
U.S. Department of Energy
Proposed Regulations
Add New Language to Section 3. Definitions Color Temperatures
Cool-Blueish White
Neutral Color
Warm- Yellowish White through Red
LED (left side of road) HPS (right)
Proposed Regulations
Lighting Design Revised
Section 4 to Include Design Options
HPS Lights No Longer Required
Correlated Color Temperature Fixtures Added
Other Lights giving a Soft Similar Effect
Ken Baker 817-748-8067