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©2007 Commercial Refrigerator Door Company The Green Light
©2007 Commercial Refrigerator Door Company Environmentally Unfriendly Lighting 20% of global electricity is used for lighting = 100 large power plants $55 billion worth of electricity goes annually to lighting costs Pollution created equals 450 million tons of CO 2 and three million tons of smog-generating gases Source: truthinlighting.org
©2007 Commercial Refrigerator Door Company LEDs: The Green Light If just 25% of US lighting fixtures were converted to LEDs, we would: Save $115 billion in utility costs Eliminate the need to build 133 new coal-burning power stations Reduce carbon emissions by 158 million metric tons Avoid releasing 5,700 pounds of airborne mercury per year Source: truthinlighting.org
©2007 Commercial Refrigerator Door Company History of LEDs In the early 20th century, scientists noted a semiconductor junction would produce light The first LED was created in the mid-1920s Developments in the 1950s led to the creation of an infrared LED, which produced light invisible to the human eye The General Electric Company developed the first practical visible- spectrum LED in 1962
©2007 Commercial Refrigerator Door Company History of LEDs Originally, small size, ruggedness and low power consumption made LEDs a great choice for indicator light applications, but not for general illumination: Automotive taillights, cell phone keypad backlighting, traffic signals, illuminated signage, camera flash and accent lighting
©2007 Commercial Refrigerator Door Company History of LEDs First white LEDs were created by combining red, green and blue LEDs In 1993, white light was produced from a single diode –Much less expensive for the amount of light generated New LED technology provides increased light output, long life, dramatic energy savings and offers a viable alternative to incandescent and fluorescent lights
©2007 Commercial Refrigerator Door Company What are LEDs? Solid-state lighting Light is emitted from a solid object (a block of semiconductor) rather than a vacuum or gas tube, as with incandescent bulbs and fluorescent lamps Produce a narrow spectrum of monochromatic light using little power Energy efficient, durable and long-lasting
©2007 Commercial Refrigerator Door Company Basic LED Components LED Chip: semiconductor diode that permits current to flow in only one direction and generates light Lead frame: holds the chip and extends out of the package to provide electrical connection Colored or shaped epoxy resin: encapsulates the LED package and directs the light outward
©2007 Commercial Refrigerator Door Company How does the LED emit light? A chip of semiconducting material is impregnated (doped), with impurities to create a p-n (positive-negative) junction (indium, gallium and nitrogen, or InGaN, in white LEDs) P side contains excess positive charge (holes, or the absence of electrons) N side contains excess negative charge (electrons)
©2007 Commercial Refrigerator Door Company How does the LED emit light? When voltage is applied to the semiconducting element forming the p-n junction: Electrons move from the N area towards the P area Holes move from the P area toward the N area Near the junction, the electrons and holes combine, releasing photons with visible wavelengths, or light
©2007 Commercial Refrigerator Door Company LED vs. Fluorescent
©2007 Commercial Refrigerator Door Company The Fluorescent Dilemma Interior case lighting accounts for 21% to 26% of the electricity required to operate refrigerated display cases Each year 600 million fluorescent lamps are disposed of in US landfills, releasing mercury into the environment It only takes 4mg of mercury to contaminate 7,000 gallons of fresh water 30,000 pounds of mercury is thrown away in fluorescent bulbs every year enough to pollute every body of water in North America. Source: truthinlighting.org
©2007 Commercial Refrigerator Door Company The LED Solution Wal-Mart replaced refrigerated case fluorescent s with LEDs in 500 stores: Annual energy savings: $2.6 million Annual CO 2 emissions reduction: 35 million pounds Contain no mercury or gas, and emit no infrared or ultraviolet radiation
©2007 Commercial Refrigerator Door Company Lighting Research Center Study Two refrigerated display cases, one with fluorescent lighting and the other with an LED system, were placed side-by-side in a laboratory setting –Study subjects strongly preferred the display case with LED lighting – Lighting distribution, not brightness or color of light, had the most impact on peoples preference
©2007 Commercial Refrigerator Door Company Lighting Research Center Study
©2007 Commercial Refrigerator Door Company Product Visibility
©2007 Commercial Refrigerator Door Company Fluorescent delivers a wide range of luminance on the shelf, between 500 and 2,800 lux LEDs deliver a much more uniform profile to the shelf Lighting Distribution
©2007 Commercial Refrigerator Door Company Due to the directional nature of LED light emission, more of the light output hits the target it is intended to illuminate Up to 95% of the illumination ends up at the desired point on the work surface Significant glare reduction The product is the STAR! Product Visibility
©2007 Commercial Refrigerator Door Company Energy Consumption Less watts needed to illuminate a case: >43% for a T8 58W electronic system on a 5-door case (41W/door) – 60% vs. HO – 78% vs. VHO LED systems range from 30W to 45W per door Wattage to Drive Lighting System 5-door case
©2007 Commercial Refrigerator Door Company Electrical & Compressor Wattage Savings 5-door frozen food case 115 Btu/hr/door savings ~14 W/door in frozen food Energy Consumption LEDs = less heat in the case Every light watt output reduced = less work for the compressor, saving ~0.455 watts per door LED vs. T-8 on a 5-door case saves 155 watts on lighting and 71 watts from reduced heat load Total reduction: 226 watts per 5-door case
©2007 Commercial Refrigerator Door Company Dimming capability and On/off cycling Dimming LEDs enables light shedding for a specific time of day or location within store: 24 hour store: shedding 30% light between 11PM and 7AM = 10% light system energy savings* LEDs turn instantly on and off in a cold environment, with no negative impact on life (unlike fluorescents) 16 hour store: turning off lights between 11PM and 7AM = 33% light system energy savings* *Based on T-8 58W 60 fluorescent system Energy Consumption
©2007 Commercial Refrigerator Door Company Maintenance/Replacement LEDs have longer life & less premature failure LED life of 75,000+ hours (8 -10 yrs) vs. fluorescent life of <2 yrs %* T-8 failure rate No scheduled re-lamps for years Reduced unscheduled maintenance of lamps, ballasts, lens & sockets *Dependent on lamp, fixture & case specifics FLU LED
©2007 Commercial Refrigerator Door Company Other Features FluorescentLED Radiant Heat Nearly HALF of energy used is given off as dissipated heat Produce very little radiant heat, stay cool to the touch Refrigerated Environment Compromised operation at cold temperatures LEDs love the cold. Light output and efficacy are not affected Durability Glass tubes are subject to breakage during shipping, installation and customer use GEs patent-pending design is impact resistant, reducing breakage associated with shipping, installation and use
©2007 Commercial Refrigerator Door Company High Power vs. 5mm LEDs
©2007 Commercial Refrigerator Door Company High Power vs. 5mm LEDs 5mm High Power
©2007 Commercial Refrigerator Door Company High Power vs. 5mm LEDs High Power5mm 1 watt packageFractional wattage (0.1 watt) Produce 40 to 50 lumens per 1-watt package Produce 2 to 4 lumens Internal heat sink extends LED life No internal heat sink Design advantages increase brightness and reduce assembly costs Mechanical design limits brightness and is expensive to produce Fewer LEDs create more light with less energy Many lights required to produce bright illumination
©2007 Commercial Refrigerator Door Company Lumen Density (lumen/mm2) 5mmHigh Power High power LEDs deliver five times the lumen density (brightness) of standard 5mm LEDs High Power vs. 5mm LEDs
©2007 Commercial Refrigerator Door Company Light Output Over Time Source: U.S. Department of Energy
©2007 Commercial Refrigerator Door Company Booster optics for improved uniformity Lens system designed for 4800 color temp Low profile design Power consumption: 40.5W on 5-foot and 45W on 6-foot Self-contained cover Universal attachment bracket Impact resistant patent-pending design NSF compliant Exclusively UL listed for commercial refrigeration GE Lumination LEDs
©2007 Commercial Refrigerator Door Company UL Listing STYLELINE LED lighting is –LED light bars: UL recognized under UL 1598, the lighting luminaire standard (E-file # E316082) –Power supply: UL recognized under UL 1012 (existing power supplies: E-file # ,new power supplies: E-file # E316517)
©2007 Commercial Refrigerator Door Company Competitive Analysis STYLELINE LED Competitor Illumination (with ambient lighting) 95 footcandles shelf avg. ~900 mid shelf *105 footcandles shelf avg. *400 mid shelf Uniformity (higher is better) >75% 25-50% Color Temp4,800K3,500K – 5,000K Color Rendering Index Visible light source?NoYes Power Consumption41W30-42W
©2007 Commercial Refrigerator Door Company Visible source impact Visible lighting is distracting! Competitor Model Visible Source STYLELINE LED Invisible Source
©2007 Commercial Refrigerator Door Company Additional LED Resources Contact your STYLELINE representative for more information Tools: –STYLELINE LED Sell Sheet –LED Payback Tool –LED Articles Reference: –www.netl.doe.gov/ssl/usingLeds/www.netl.doe.gov/ssl/usingLeds/ –www.lumination.comwww.lumination.com –www.truthinlighting.orgwww.truthinlighting.org
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