Mississippi Power's Outdoor Lighting team members are the "Outdoor Lighting Experts" in Mississippi.
In addition to our many years experience providing quality, affordable outdoor lighting to customers throughout the state, and tens of thousands of lights installed and maintained, we are members of, and participate in, many lighting industry organizations. Our leadership roles in many of these organizations enable us to stay on the cutting edge of outdoor lighting technology, lighting industry trends, products, procedures, legislation, ordinances and regulations.
Listed below are links to information and resources to help broaden your knowledge of outdoor lighting and related issues and topics.
Mississippi Power Outdoor Lighting Position Statements:
Mississippi Power Position Statement on Light Pollution
Light pollution has become a significant issue for many communities as well as some national and international organizations. Light pollution is defined as "any adverse effect of artificial light, including sky glow, glare, light trespass, light clutter, decreased visibility at night, and energy waste."
We at Mississippi Power believe that by combining our expertise with organizations such as the illuminating Engineering Society of North America (IESNA), the National Electrical Manufacturers Association (NEMA) and other focused groups, we can identify solutions that preserve and protect the night sky while still providing the illumination people need.
Our outdoor lighting experts combine their design skills with a wide range of products to offer systems that meet our customers' performance, safety, security and economic criteria while minimizing sky glow and light trespass.
Process for designing effective outdoor lighting:
- Evaluate need for lighting
- Determine appropriate light level based on IESNA guidelines
- Contain light and glare within property lines with proper pole and lamp selection and placement
- Consider controls that allow lights to be turned off or to reduce light levels during inactive periods
We anticipate awareness of light pollution will continue to grow as new research is published concerning its relationship to health, ecology, wildlife, etc. For additional information on outdoor lighting and Mississippi Power's commitment to offering innovative ideas, please contact us at 1-877-656-1836.
Mississippi Power Position Statement on Light Emitting Diode (LED) Outdoor Lighting Systems
Outdoor lighting systems using new Solid-State LED technology have attracted considerable news media attention and public interest. Since 2008, Mississippi Power has tested and evaluated this technology and monitored the progress being made to make this a viable light source option for our customers for outdoor lighting applications. Information from LED and lighting fixture manufacturers and professional organizations including the American National Standards Institute (ANSI), the Illuminating Engineering Society of North America (IESNA), the U.S. Department of Energy (DOE), and the Electric Power Research Institute (EPRI) has been included in our review and evaluation process.
Mississippi Power believes LED is a very viable outdoor lighting technology, offering energy savings, long life, reduced maintenance, surface illuminance uniformity and the ability to more precisely control light distribution for outdoor lighting applications.
With the advances made in the development of solid-state lighting technology and the availability of LED lighting products for roadway and area lighting applications, Mississippi Power, in January 2012, added to its product offering LED outdoor lighting products for select applications from manufacturers whose products met our quality and performance criteria. We expect that the ongoing progress and improvements being made in LED outdoor lighting will enable us to continue adding LED products for additional lighting applications to meet our customer's needs.
For additional information please contact Mississippi Power at 1-877-656-1836.
HID or High-Intensity Discharge
HID or High-Intensity Discharge is a general term used to designate four different types of lamps commonly used for outdoor lighting: mercury vapor, high-pressure sodium, low- pressure sodium and metal halide. HID lamps require a warm-up period to reach full light output. A momentary loss of power can cause the HID fixture to re-strike and have to warm-up again Ð a process that can take up to 15 minutes.
- Mercury Vapor (MV) lamps, in use since the late 1940's, produce a distinctive bluish-green light and provide poor color rendition. MV light output gets steadily dimmer with age while using the same amount of energy. The mercury vapor lamp is considered obsolete by today's standards. The Energy Policy Act of 2005 banned the production, import and sale of mercury vapor ballasts and fixtures effective January 1, 2008.
- Low-Pressure Sodium (LPS) lamps release a monochromatic yellow light and provide poor color rendition. As LPS lamps age they start to use substantial amounts of energy but continue to provide the same amount of light. LPS is not widely used in street and area lighting applications.
- High-Pressure Sodium (HPS) lamps, first used around 1970, are the dominant type of HID light source in use on American roads. HPS produces an amber-white light, but they provide poor color rendering meaning that colors cannot be differentiated. HPS lamps are a very efficient light source and have a relatively long and reliable lifespan.
- Metal Halide (MH) lamps produce an intense white light and provide very good color rendition. MH lamps provide a high efficacy (lumens per watt) and moderately long bulb life (up to 15,000 hours). MH is widely used for area lighting of commercial, industrial and public spaces such as parking lots and for security lighting.
Induction lighting systems are electrode-less and very similar to conventional fluorescent lighting systems. Induction lighting systems are composed of an electronic ballast (used to generate a high frequency electronic current), a lamp or discharge vessel (filled with a mixture of gases including mercury), and a power coupler (an induction coil to convert the high frequency electronic current into a magnetic field within the discharge vessel). Induction outdoor lighting systems are energy efficient when compared to mercury vapor but not when compared to HPS, provide white light with good color rendering (80+ CRI), quick ignition and re-ignition, and a rated life of up to 100,000 hours. Photometric performance does not compare well to HPS for outdoor lighting applications.
LED or Light Emitting Diode
LED or Light Emitting Diode technology is rapidly becoming competitive with high-intensity discharge light sources for outdoor lighting applications. Well-designed LED outdoor lighting luminaires can provide the required surface illuminance using less energy and with improved uniformity compared to HID light sources. LED luminaires may also have significantly longer life (50,000 hours or more) with better lumen maintenance. Other advantages of LED also include that they contain no mercury, lead or other known disposal hazards and they come on instantly without a warm-up or re-strike delay. LED technology is improving rapidly in areas of efficacy, color quality, optical design, heat management, and cost and is compatible with dimming and controls systems.
LEP or Light Emitting Plasma
LEP or Light Emitting Plasma technology is an emerging light source and a possible choice for high lumen outdoor lighting applications. The LEP system consists of an emitter, driver and power supply. LEP is a category of solid-state lighting but is not an LED. With LEP a solid-state device is used to generate radio frequency energy which powers a plasma light source (quartz capsule embedded in a ceramic puck). Light Emitting Plasma technology promises high lumen output, good color rendering, long life, energy efficiency, reduced maintenance requirements and compatibility with dimming and controls systems.