©2007 Commercial Refrigerator Door Company The Green Light.

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The Green Light

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 CO2 and three million tons of smog-generating gases

Source: truthinlighting.org

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

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

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

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

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

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

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)

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

LED vs. Fluorescent

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 isthrown away in fluorescent bulbsevery year — enough to polluteevery body of water in North America.

The LED Solution

• Wal-Mart replaced refrigerated case fluorescent s with LEDs in 500 stores:

Annual energy savings: $2.6 million

Annual CO2 emissions reduction:35 million pounds

Contain no mercury or gas, and emit no infrared or ultraviolet radiation

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 people’s preference

Lighting Research Center Study

Product Visibility

• 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

• 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

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 toDrive

LightingSystem

5-door case

295155

VHO HO T8

Compressor

Lighting

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

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

Maintenance/Replacement

• LEDs have longer life & less premature failure

LED life of 75,000+ hours

(8 -10 yrs) vs. fluorescent life of <2 yrs

10 -15%* T-8 failure rate

No scheduled re-lamps for 8 -10 years

Reduced unscheduled maintenance of lamps, ballasts, lens & sockets

*Dependent on lamp, fixture & case specifics

Other Features

Fluorescent LED

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

GE’s patent-pending design is impact resistant, reducing breakage associated with shipping, installation and use

High Power vs. 5mm LEDs

5mmHigh Power

High Power 5mm

1 watt package Fractional 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

Lumen Density(lumen/mm2)

5mm High Power

• High power LEDs deliver

five times the lumen density (brightness) of standard 5mm LEDs

Light Output Over Time

Source: U.S. Department of Energy

• 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

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 # 219167,new power supplies: E-file # E316517)

Competitive Analysis

STYLELINELED 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 Temp 4,800K 3,500K – 5,000K

Color Rendering Index 72 72-80

Visible light source? No Yes

Power Consumption 41W 30-42W

Visible source impact

• Visible lighting is distracting!

Competitor ModelVisible Source

STYLELINE LEDInvisible Source

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.lumination.com– www.truthinlighting.org

©2007 Commercial Refrigerator Door Company The Green Light.

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